The product has been independently deployed with the new GO language enterprise-level instant messaging source code of Yixin IM. It is compatible with all platforms for chatting, calling and social interaction. Trust Jinan Yiruan Network! Recently, many of our peers have been imitating us, but please keep your eyes wide open, boss: Starting from 2022, we will never change our name or the main company! The genuine [Great Emperor 👑 crown] of mutual sites is the mirror of our strength. Those merchants who frequently change their names and evade after-sales responsibilities, no matter how similar the layout is, can never copy away our technical foundation and reputation! Buying source code means buying after-sales service. Don't use your project as a guinea pig for inferior merchants! Core demonstration address (Please copy the link below to your browser and open it) Official website of Yixin IM High Concurrency Architecture Technology: https://www.yixinim.com browser direct experience, Android demo version has been integrated with Huawei push, Jiguang can test offline push and call project cooperation instructions, Yixin only provides project source code for this cooperation, It does not include server deployment, environment setup, installation configuration, and subsequent operation and maintenance services. However, we provide a complete deployment tutorial and AI automation setup. Before cooperation, both parties need to sign a formal contract, clearly defining the project content, delivery standards, payment methods, and responsibilities of both parties. To complete the contract signing and identity verification, please provide the information on both sides of your ID card. The relevant information will only be used for contract and cooperation filing. We will strictly keep it confidential and not use it for any other purposes. Please confirm the above cooperation conditions before proceeding with subsequent communication. Yixin System adopts a push architecture of "iOS official APNs + Android multi-vendor channels", with the server uniformly managing push configuration, device token, failure logs and channel switching. This can ensure the compliance and stability of Apple, and cover mainstream models such as Huawei, Xiaomi, OPPO, and overseas FCM for Android, reducing the risk of missed offline message push. [Apple Push Solution] iOS uses Apple's official APNs push service. After the App is launched, the server sends a notification to APNs through the certificate/key provided by Apple, and APNs then pushes the message to the user's iPhone. Features: Uses the official Apple channel, stable and compliant. Supports offline message notifications, sounds, superscripts, and click to jump to chat. The push key is only configured in the background/server and is not exposed to the App. In the background, you can view the reasons for the success or failure of the push and the status of the device token. [Android Push Solution] Android adopts a multi-channel push solution, automatically selecting the most suitable push channel based on the user's mobile phone brand. Support direction: Huawei: HMS Push; Xiaomi: Mi Push; OPPO/ OnePlus /realme: OPPO Push; Overseas Android: FCM; Other domestic models: They can be guaranteed through the JPush manufacturer channel. Features: It does not rely on a single push service and covers more Android devices. The same device should store independent tokens by manufacturer to avoid mutual overwriting. When the main channel fails, you can try the backup channel. The background can view push reports, failure logs, invalid tokens, and supports the cleaning of failed devices. 💡 Reject concept hijacking: Why don't mature projects blindly adopt unproven technical concepts? Some technical solutions on the market blindly boast about self-built audio and video systems overseas and the opening of advanced transmission protocols across borders. However, in the actual complex public network and mobile cellular network environment, unknown external UDP traffic is highly vulnerable to strict QoS speed limits and a high proportion of packet loss by domestic and overseas operators, resulting in frequent connection disconnections. And self-built audio and video forwarding is a resource black hole where high-defense bandwidth is exclusively enjoyed by high-cost data centers. We offer free upgrades to our customers for the self-built LiveKit version. In the early stage, you need to bear the cost of exclusive high-defense bandwidth for hundreds or even thousands of megabits in the data center alone. We will start internal testing in 2025, and all functional interfaces will be fully disclosed. It's normal for competitors to copy our Go+Flutter selection, but counterfeits are still counterfeits - they only blindly stack functions. The sewn code is like a mountain of shit that you simply can't maintain in the later stage. We don't tell stories; we just provide you with the technical foundation that enables you to go live and make profits immediately. The instant messaging system developed by the Yiruan team is dedicated to the most practical, lightest deployment, and most powerful concurrent pure Go + high-speed memory sharding lock gateway architecture. We use a purely hand-tuned architecture to smooth out lock competition and do not rely on bloated external third-party queues. A 100-yuan Baota VPS can stably handle 20,000 concurrent connections. Our delivery is a clean, layered and insulated full-stack pure plaintext source code. [When buying a system, don't just look at the demonstration. Think more about who will pay for the later maintenance!] There are many peers in the market who, under the banner of Go+Flutter, stack up their functions in an exaggerated way, seemingly offering extremely high cost performance. But the layman sees the excitement, while the expert sees the essence: the more functions you pile up and the more chaotic the underlying logic becomes, the more you buy a "mountain of code shit" that could collapse at any moment! Later on, if you want to make A slight change to the interface or add some logic, it will crash. The maintenance cost may even exceed that of redeveloping! Yiruan does not engage in fancy stitching. We only offer genuine "industrial-grade delivery" : we reject mountain of code and make it extremely easy to maintain in the later stage. We never blindly stack functions just to make up the numbers. Based on a high-performance AI R&D flow with an average of hundreds of billions of tokens per month, the code is constrained by industrial-grade standards, and the decoupling of modules is extremely clear. Your technical staff can take over the secondary development and understand the architecture within half a day, reducing the later maintenance cost by 80%! As long as your logic is clear, there is no function that cannot be developed: Don't let the "finished system" of your peers hold your business hostage. Relying on our extensive AI matrix development system, we can carry out high-standard customized development for any complex business logic you want within a short period of time, and ensure the purity of the code. With the same technology stack, what we compete on is the underlying strength: both are Go/Flutter, and we don't rely on copywriting to boast. What we are determined to focus on is the real pressure testing under hundreds of thousands of concurrent users, as well as core security mechanisms such as security policies and dynamic digital watermarking, to truly safeguard the assets of online operations. Pure source code, no hidden restrictions: Full-channel commercial authorization, no backdoors, no malicious encryption. Lightweight and efficient, it is very easy to undertake development: Yixin adheres to the pure Go language backend + high-speed memory sharding lock core underlying layer, and does not rely on bloated and complex microservice middleware. A cloud server with a regular configuration can smoothly support tens of thousands of concurrent long connections, ensuring that your technical team can clarify the logic and take over smoothly in a short time after obtaining the source code, and carry out agile secondary business customization. In August 2021, Yixin IM completed the special pressure test of 20,000 concurrent users on the real public network of Alibaba Cloud PTS: 40 public network pressure ips were distributed to apply pressure, and the concurrent users increased to 20,000 within 2 minutes. A total of 20,000 user logins were initiated in the test. 19,889 accounts were successfully logged in, and 19,852 authenticated WebSocket connections were successfully established. The success rate of the complete access link was 99.26%, and the success rate at the request level was 99.63%. The average connection response of WebSocket was 143.72ms, and that of P99 was only 279ms. During the testing period, there were no 429 rate limiting, no 4xx or 5xx business errors. Professional stress test results have verified that Yixin IM has the capacity to accommodate tens of thousands of users and carry nearly 20,000 long connections. Yixin IM pressure test report number: M8ZF172K. Original PDF report verification can be provided, and the test data is true and traceable. Test machine This pressure test of Alibaba Cloud's 8-core 16G 10M is not the upper limit. The cost conditions for the pressure test are limited. A single machine with 8 cores and 16g is expected to stably support 50,000 to 80,000 concurrent users. Our demonstration station with 56 cores and 128g can simultaneously support 350,000 to 400,000 concurrent users. Later, we will develop and optimize the cluster deployment to truly achieve one million concurrent users. Currently, the open-source source code is 28,888 yuan without negotiation. The price will increase later and return to the original 40,000 yuan. Thank you all for your check-ups on Yixin IM and your valuable suggestions. If there are any bugs, we will optimize and fix them to the end. We will truly polish an instant messaging system that combines appearance and performance! In the complex and intricate real network environment both at home and abroad, the pure, clean TCP + WebSocket connection pool technology, which has been optimized for high concurrency pressure, is the most versatile and noise-resistant commercial foundation globally. Commercial Licensing and Delivery Solution (Commercial Grade) Core Assetization · Secondary Development Preferred Full-Stack Source Code - Commercial Licensing Version (Price increases with version updates, get on board early to enjoy subsequent free updates) V5.0- 28,888 yuan Cluster Version V6.0- 68,888 yuan Positioning: Build enterprise-level digital assets and support in-depth secondary development. Source code: Go back-end + Flutter front-end pure plaintext source code without confusion, fully delivered. Empowerment: Including database DDL, API interface documentation, and one-click Docker orchestration scripts, guiding technical takeover. Protection Statement: Any form of secondary reselling or packaging and distribution of the source code is strictly prohibited. Official authority function document (jinshan/WPS cloud document) 1. One letter function list: https://www.kdocs.cn/l/chxZ3a0EJHaR 2. One letter V5.0 function listing _20260806: https://www.kdocs.cn/l/cubVOhPKk4UZ 3. One letter function interface complete description: https://www.kdocs.cn/l/ccu78Tb05ZAn 4. One mail client: https://www.kdocs.cn/l/ctrR9XSv2W67 5. One letter interface data flow: https://www.kdocs.cn/l/crPxYT4dpRXe one faith panoramic iterative update log one IM cluster V6.0 source version | open source 68888 yuan real cluster update cycle: After three months of refinement, this is a truly solid cluster. For more details, please experience the demonstration site. The source code layout of the Yixin IM cluster is for teams that wish to use their own servers, master the complete code, and continue with secondary development. In the past three months, we have refined the multi-node communication, client line selection, node operation and maintenance, and source code delivery processes, and opened three application service lines in the demonstration environment. Cluster capability: 1. Application nodes can expand the server side as business grows, supporting multiple API nodes with independent identities to work collaboratively. Customers can start with a smaller-scale deployment and then plan to add new application nodes based on business volume. New nodes are added to the official line only after being configured, monitored and verified by the client. 2. Messages can be delivered to users across nodes. Even if different application nodes are connected, messages can still be sent and received within the same business environment. The cluster source code includes cross-node events, online status synchronization, WebSocket real-time communication, and message history readback mechanisms. The demonstration environment has been verified with two real Android devices for cross-node private and group chat text message sending and receiving, as well as reading after reopening the App. 3. The client supports automatic line selection and manual switching. The client can view the delay and pressure of the open lines, select the automatic mode, or manually specify the lines. REST requests and WebSocket connections are switched in pairs at the same node, making it convenient for users to understand the actual lines they are connected to. 4. When an application node fails, the line can be switched. When the open API service is unavailable, the client has the ability to switch to other available lines. The demonstration environment has verified that the dual real machines continue to complete text message sending and receiving as well as cold start reading back in the scenario where the specified API service has been stopped. 5. Provide recovery mechanisms for messages and background tasks. The source code includes designs such as message idempotence, receipt compensation, event out-of-box and retry, and task lease, which are used to handle issues such as node restart, connection interruption, and task duplicate execution. There are also corresponding node collaboration mechanisms for background tasks such as robots and scheduled messages. 6. The management end of the supporting node management and release tool can view the node list and operational status. The deployment process is equipped with configuration pre-check, monitoring, node-by-node update and rollback tools. New nodes will not be automatically opened to the client merely because the service has been successfully started; they also need to pass the actual business acceptance. The value delivery scope of source code covers Go server-side, Flutter multi-platform project source code, H5/PWA, operation and customer service backends, as well as configuration templates, deployment scripts and technical documents. Customers can use their own domain names and servers within the scope authorized by the contract, adjust their brands, functions and business processes, and continuously maintain their own IM systems. Video demonstration: V6.0 is officially released! Yiruan · Yixin IM System 5.0 is a leapfrog major version, fully entering a new era! The update log of Yixin as of July 29, 2026, v5.0.0+30, involves 236 files and approximately 28,000 new lines of code. [New Features] A new message detail page has been added, supporting the viewing of delivery, read, withdrawn status and member receipts. New message collection, uncollection, paginated list and multi-device synchronization have been added. New restrictions on multiple message merging and forwarding, forwarding preview, and nesting levels have been added. Improve the clearing of chat records, message location, search context and draft recovery. Improve the remarks of group chat members, the confirmation receipt of group announcements, group permissions and the capabilities of administrators. New mobile phone number registration verification codes and complete mobile phone number verification have been added. A two-step verification login interception has been added. No official Token will be issued before the verification is passed. The Windows online installation package allows the retention of necessary local address identification codes while strictly verifying the official API, WS and Bootstrap addresses. Android automated testing supports different resolutions and adds real UI sending and backend database reverse checking. Dear users: Yixin has recently completed a new round of functional upgrades and system optimizations, and version 5.0.0 has now been released. This update focuses on enhancing the stability of chat, calls, incoming call notifications, and media messages, providing users with a smoother and more reliable experience. I. Update Contents of This Update 1. Chat Experience Optimization: Optimize the sending, receiving, and historical message loading of private and group chat messages; Improve message recovery after network switching and front-end/back-end switching; Optimize the functions of read, delivered, recalled, forwarded and collected messages; Fix issues such as abnormal offline message sequence and repeated display; Optimize the chat draft, conversation list and search location experience. 2. Optimization of image, video and file functions: Supports sending original images and GIF animation messages; Optimize the retry process after video preview, playback and sending failures; Enhance the stability of voice message sending, playback and continuous playback; Optimize the experience of file upload, download and system opening; Improve the media upload and breakpoint recovery capabilities in weak network environments. 3. Optimization of call and incoming call experience: Fixed the issue where the other party's phone occasionally kept ringing after one party hung up. Optimize the call status cleaning during continuous dialing, answering and hanging up. Enhance the caller ID display capabilities in the front desk, back office, and lock screen states. Optimize the recovery mechanism after the interruption of the call network; Improve the experience of video calls, voice degradation and camera status recovery. 4. Login and Account Security Optimization: Optimize the login, logout, and account status restoration processes; Strengthen the format verification of SMS registration, verification codes and mobile phone numbers; Optimize multi-device login reminders and account data isolation; Improve the capabilities related to two-step verification, application locks and biometric recognition; Enhance the security of historical messages and trusted device recovery. 5. Notification and System Compatibility Optimization: Optimize incoming calls, group announcements, meetings, and system notifications; Add notification privacy and notification master switch control; Fixed some abnormal installation and notification issues on Android devices; Optimize iOS initial launch, background incoming calls and system compatibility; Continuously improve the capabilities of application version updates and patch upgrades. Update Log of Yixin IM V5.0 on June 27, 2026.06.27: Dark Experience, Message and Call reliability, Push pull, H5 and back-end operation and maintenance are all completed. It not only strengthens the chat, emojis, data, and dark mode that users can perceive every day, but also reinforces the message, call, push, back-end processing and release verification links. [Client Experience Upgrade] Global Dark Mode Refinement: Retain the black and gray brand direction, split the dark interface controls and accent colors, and improve the readability of dark scenes such as buttons, wallets, members, Settings, group profiles, and discovery pages. Chat visual unification: The message list, private chat details, group chat details, channel information, and group information pages are closed according to the new visual version, with reduced jarring borders and enhanced content hierarchy and click feedback. Enhanced sticker and emoji capabilities: Optimized WebP/GIF emoji display, installation package entry, emoji panel, and sending link to make chat expressions more complete. Data and Settings page upgrade: Personal homepage, data background, member style, nickname color and Settings page header image are compatible with old data. Old users can still display normally after the upgrade. H5 / PC responsive experience: Uniformly use the root Flutter Web product, adapt to H5 and PC browser previews, and switch the demo entry to the new version imh5.66demo.cn. [Reliability and Background Capability] Call status machine reinforcement: Fixed issues related to abnormal call states, secondary picking up, and status cleaning after rejection/cancellation/hanging up, reducing the risk of getting stuck in a call and being unable to initiate again. Forced call termination in the background: The management background has added the ability to handle abnormal calls. It can manually force the termination of timeout, residual, and abnormal call records, which is convenient for operation to provide a safety net. Missed message catch-up mechanism: Actively synchronize missed messages after login, startup, front-end and back-end recovery, and WebSocket reconnection, reducing message gaps caused by weak networks, back-end issues, and device switching. Huawei HMS Push Enhancement: Retain verified system notification payloads, complete the accessibility of click actions, front-end displays, and back-end notifications, and take into account the channels of real device manufacturers. The online demonstration entry is unified: the official website, interface, backend, H5, customer service and download address are all switched to the new domain name 66demo. The backend demonstration account is fixed as demo/demo123. [Core Experience Upgrade and Underlying Reinforcement] End-to-end Encryption (E2EE) : Introducing a brand-new end-to-end message encryption capability to comprehensively safeguard the core security of data. The background supports flexible switching among three modes: "Plaintext", "compatible encryption", and "strict encryption". Seamless hot update patch system: Say goodbye to the cumbersome whole package download! The hot update system supports silent checking, patch distribution and result reporting, keeping the client always at the forefront. Professional-grade audio and video conferencing module: Built-in complete multi-person audio and video conferencing system. Supports one-click creation and password invitation, granting the host full control over the venue (mute, move out, transfer). All-round membership privilege system: Added a complete membership ecosystem. C-end users can smoothly view and purchase packages. The management backend simultaneously launched a visual dashboard for member order and authorization management. Exclusive emoji store synchronized with the cloud: A brand-new emoji store has been launched, with a vast array of emoji packs available. The user's "Installed/Collected/Customized" emojis are fully synchronized in the cloud, allowing seamless roaming across multiple devices. Custom Discovery Portal: A new Portal section has been added to the bottom navigation. In the background, columns, ICONS, and direct urls can be freely configured, perfectly integrating the native navigation visuals of the App. Password recovery and payment closed loop: Complete the independent "password recovery/reset" process and add an online payment completion display page. Multi-device anti-kick architecture: Reconfigure session logic, clearly view active devices, and support one-click "terminate specified device" or "offline other devices". Location message card-ization: Location sharing has been upgraded from ordinary links to beautiful map structured cards containing longitude and latitude, address details, and supports awakening navigation. Historical version evolution (V2.0 - V3.0) Dedicated customer service closed loop: Added independent customer service backend (admin-kf/); After the invitation code is verified, it will be automatically bound to the customer service to establish a conversation. Commercialization chain: Supports online payment order inquiry and callback through mainstream channels; The payment and SMS gateways can be dynamically configured in the background. Community governance: Supports the Posting and withdrawing of group announcements, and pinning key messages to the top. Support the preview and capture of chat external link cards. Group avatar Settings, member filtering; Support group members to hide from each other; Support customizing the upper limit of group members. Cross-platform ecosystem: Added a desktop scanning code login mechanism; A strategy for forcibly binding a mobile phone number before critical operations. Fully support adding friends by scanning codes, joining groups by scanning codes, and logging in with authorized devices by scanning codes. Account intervention: Modify user passwords in the background, implement strong control over abnormal accounts and kick them offline. The system has a built-in default "Team Customer Service" account. Underlying performance: Significantly enhance the response speed of push notifications; Optimize the image media loading strategy to reduce network loss. Optimize the connection stability of the WebSocket buffer pool; Optimize memory usage and bid farewell to list sliding lag once and for all. Since writing the first line of Go language backend code in October 2025, the Yiruan team has been committed to creating a truly resilient private IM- Yixin. After four months of core research and development, the 64-point high concurrency locking problem was overcome. Pass the fully enclosed high-pressure internal test in January 2026 and refine the Flutter four-terminal experience. This is not the end, but the starting point for us to jointly build a privatized social system. Core architecture and panoramic business matrix architecture: Core: Utilizing 64-slice locks (FNV hash) to eliminate lock bottlenecks, combined with a multi-worker parallel model and over 50,000 buffer channels to handle traffic peaks. High-throughput delivery: Utilize Redis message queues (batch I/O, dead letter/delay queues) to achieve high-throughput and highly reliable message delivery and storage sharding. IM Foundation: Full-end coverage of private chats, groups, and channels, supporting full-media messages, receipts, withdrawals, and full-text search. RTC call: Integrated Agora, low-latency 1v1 audio and video, supports CallKit and floating Windows. Community ecosystem: Built-in dynamic square similar to Moments, featuring refined group member permissions, roles, and mute management capabilities. Multi-terminal joint debugging: iOS, Android, macOS, Windows 10/11 data synchronization and interoperability. Video Live demonstration of V5.0 and V1.0 Yixin - Your Private Enterprise-level Communication System I. Why Do you Need a Set of Your Own IM? In this software, all data permissions belong to you, and chat records are stored on an independent server. Not only does it avoid the risk of traffic interruption on third-party platforms, but it can also completely prevent the leakage of core business secrets. After we authorize the source code, you only need to deploy it to the cloud and change the UI logo to transform it into your exclusive APP. Ii. Why is the underlying architecture of Yixin more stable than that of its competitors? Many old Java architecture source codes are still using SDKS from several years ago. Not only do they frequently lag in high-concurrency scenarios, but they are also incompatible with the constantly evolving mobile system kernels. Yixin has restructured the underlying concurrent infrastructure: 1. Regarding the "64-shard lock" : The traditional architecture of the checkout counter that resolves single-point congestion is like a narrow bridge, and a sudden increase in requests will inevitably lead to congestion. Yixin implements a "64-slice lock" at the business logic layer. When traffic flows in, it distributes the concurrent pressure to 64 independent processing units through a hash algorithm. Even if 100,000 people establish connections simultaneously, it can still ensure a smooth response within milliseconds. 2. Regarding "Multi-worker processing" : The asynchronous concurrent sorting matrix is resident in memory, and we decouple the connection module from the broadcast module. Register a Worker to handle handshakes and heartbeats exclusively; The broadcast Worker is dedicated to handling the fan-out push of massive messages. Bid farewell to "sending messages and going around in circles" completely. 3. Regarding "Redis Message Queue" : The buffer pool for dealing with traffic peaks, when facing mass broadcasting, the instantaneous ultra-high QPS will directly break through traditional databases. Yixin uses Redis queues as a buffer reservoir to achieve "peak shaving and valley filling" and batch writing to disks, which not only ensures strong data consistency but also makes the server as stable as a rock. Iii. Function Display Board: Not Only IM, but also a closed-loop private domain ecosystem real-time audio and video system: The underlying layer integrates Agora's weak network confrontation technology. 5. Yixin IM Enterprise-level source code Module view 📦 yixin-im-enterprise // full-stack instant messaging private core engineering library 📂 backend/ // Go language high concurrency microservice cluster 📁 cmd/ // core service daemon and initialization entry 📁 internal/ // Business Hub system ├─ 📁 cache/ // Redis global state and session cache layer ├─ 📁 handlers/ // RESTful API routing distributor (authentication/group/wallet/address book) ├─ 📁 mq/ // Distributed message queue (buffering and peak shaving/delay processing) ├─ 📁 shard/ // high concurrency sharding lock underlying scheduling └─ 📁 ws/ // WebSocket real-time full-duplex connection pool management 📁 models/ // MySQL and MongoDB data structure mapping 📁 deployments/ // Containerized orchestration (Docker) and Baota one-click deployment script 📂 lib/ // Flutter 3.x cross-platform rendering engine (iOS/Android/PC) 📁 core/ // end-side system-level core capabilities ├─ 📁 router/ // GoRouter Immersive Cross-screen Routing System ├─ 📁 services/ // WebSocket synchronization, APNs push, Agora Audio and video integration └─ 📁 storage/ // Isar Database billion-level local offline persistence 📁 features/ // modular application ribbon ├─ 📁 chat/ // chat master (message bubble/file stream/long press panel) ├─ 📁 call/ // System-level VoIP call control and floating picture-in-picture ├─ 📁 moments/ // rich media dynamic square component └─ 📁 wallet/ // asset system (red envelopes/transfers/bill statements) 📁 shared/ // global highly reusable UI View and animation component library 📂 admin/ // Vue3 + TS enterprise-level data management console 📁 src/api/ // data disk interaction and status control interface 📁 src/views/ // background visualization panel ├─ 📁 dashboard/ // ECharts core Operation data monitoring dashboard ├─ 📁 system/ // session security review, user control, global system configuration └─ 📁 wallet/ // financial approval (withdrawal/recharge/fund flow traceability) 💡 architecture formula: Sharding lock (lock-free) + multi-Worker (parallel computing) + Redis MQ (asynchronous peak shaving) + connection pool reuse + MongoDB sharding = stable and highly available IM architecture 📊 yixin 's full-scenario function matrix list: Full-stack self-developed · enterprise-level private full-function empowerment I. Client Functions (IM App) 1) Account and Security Account System: Registration, login, username verification, Token refresh, Logout, password change Quick Login: QR code creation, login status polling, confirmation of logged-in devices Privacy Protection: Privacy Settings, blacklist, account Logout Terminal Security Device list, session list, offline other devices/sessions, single device offline mobile phone capability: Binding mobile phone number, sending binding verification code push capability: push Token reporting/deletion, push preference Settings 2) Instant messaging session types: one-on-one chat, group, channel session management: Create, view, edit, delete, hide group governance: Member addition and deletion, role setting, group entry approval, invitation link to join the group, active exit from the group. Session operations: top, mute, mark unread, clear chat records. Group expansion: group announcement management, message top. Message capabilities: send, synchronize, recall, delete, read receipt, edit, forward, emoji response. Message search In-session search, media/file list, media quantity statistics. 3) Contact and social contact management: contact list, add, delete, remarks. User discovery: User search, data view, common group query. Reporting entry: Users can directly submit reports. 4) Dynamic square content release: Release, edit, delete dynamic interaction capabilities Like, unlike, comment content discovery: Hot topics, dynamic search Personal Center: My Updates, My Likes, My Comments, Received liked content Blocking: Block single updates, block user updates 5) Audio and video and real-time real-time communication: WebSocket online communication and status synchronization Audio and video calls Initiate, answer, reject, end, cancel, historical record link preview: The URL in the message is automatically previewed. 6) Wallet and Member Wallet Basics: Wallet information, transaction flow, wallet Settings Payment security: Payment password setting/modification, strong payment password verification Recharge capability: Online payment order placement, payment order inquiry, recharge order submission, recharge record iOS supports the CallKit protocol, and incoming calls directly invoke the system's native answering interface. "Moments" social graph: Equipped with highly scalable dynamic square components. Supports rich text publishing and asynchronous like interaction streams, significantly increasing the daily active users within the app. Refined Group Governance (RBAC) : Adapted to communities of thousands. It covers multi-level administrator Settings, targeted silencing, poster viral group entry and withdrawal control. Cutting-edge technology stack for rapid cost reduction: The high execution efficiency of the backend Go language can reduce server overhead by 60%. Front-end Flutter cross-platform rendering eliminates the maintenance costs of multiple native teams. Yixin - White Paper on Instant Messaging Architecture Technology This section is specifically designed for technical executives, Ctos, and system architects to read. The product overview is built based on the Golang (Server) + Flutter 3.x (Client) technology stack. Anchoring tens of millions of registrations and high concurrency concurrent online (CCU) metrics, combined with multi-level memory buffering mechanisms and asynchronous reliable message delivery strategies. 2. Core concurrent parsing Sharded Locks: The FNV algorithm is adopted, and the granularity is cut to 64 independent slots, strictly ensuring that the SeqID monotonically increases. Reactor variant model: Registry Workers and Broadcast Workers are completely isolated to prevent prolonged I/O blocking. Redis MQ: Abnormal messages fall into the DLQ queue; Consumers adopt prefetching and consolidated submission strategies to reduce competition in DB connection pools. 3. Technical Selection Table: Client Layer: Flutter 3.x + Riverpod; Local Persistence: Isar Database (All asynchronous transactions); High Concurrency: Server Layer: Golang + Gin; Cold and Hot Storage: MySQL 8.0 + MongoDB Sharding 4. The delivery list (source code authorized version) covers the complete Flutter plaintext source code without confusion for iOS/Android/macOS/Windows. It includes the complete set of Golang source code for the core IM engine and the back-end management system. Standardized API interface documentation, database ER diagrams, and one-click installation scaffolding. Channel system thresholds: Group upper limit, channel upper limit, recall time limit, IP/ user frequency limit, heartbeat timeout. Audio and video configuration: Agora switch, App ID, certificate, Token expiration time. Push configuration: APNs switch and parameters. Upload restrictions: image/video/file/voice size limit. Protocol document: User Agreement and Privacy Policy (Supporting Markdown) Official Resources: Official Users, Official Groups, Official Channels, Discovery Page Entry Management 7) Operational Capabilities Global Announcements: Announcement Sending, Announcement List, Batch Cleaning Official Customer Service Backend Customer service login, data management, welcome message, invitation code, invitation relationship, customer service board 8) Permission and Role control Administrator system: Administrator login, current administrator information, password modification Role stratification: Administrator, administrator, demo Administrator write Permission control The key write operation requires writing the permission role. The demonstration administrator only views the transaction evaluation < 1/1 page >. Jump to the transaction rules. Transaction process. Shipping method: 1. Automatic: For the products marked as automatically shipped in the guarantee service above, after placing the order, you will automatically receive the product acquisition (download) link from the seller. 2. Manual: For items not marked with automatic shipping, after placing an order, the seller will receive an email or text message reminder. You can also contact the seller via QQ or the phone number provided in the order. Transaction cycle: 1. Default transaction cycle for source code: 1 day for automatically dispatched goods and 3 days for manually dispatched goods. Buyers have the right to extend the transaction cycle by an additional 3 days once. 2. If both parties still fail to complete the transaction within the above-mentioned transaction period, either party may initiate a request for an additional period (1 to 60 days), and the period can be extended if the other party agrees. Refund Instructions: 1. Description: If the source code description (including the title) does not match the actual source code (e.g., describing PHP as ASP, the described functions are actually missing, or the version does not match, etc.); 2. Demonstration: When there is a demonstration station, it is less than 95% consistent with the actual source code (except where the description contains a significant statement such as "not guaranteed to be exactly the same, there is a possibility of change"). 3. Shipping: Manually ship the source code. If a refund has been applied for before the seller ships the goods; 4. Installation: Where the source code for free installation services is provided but the seller fails to fulfill the obligation; 5. Fees: Any additional charges (except those explicitly stated in the description or agreed upon by both parties before the transaction); 6. Others: Such as hard and routine issues related to quality, etc. Note: If any of the above conditions are verified, a refund will be supported, except where the seller actively resolves the issue. Note 1: Mutual sites will permanently archive the transaction process and snapshots of the traded goods of both parties to ensure the authenticity, validity and security of the transactions! 2. Mutual sites cannot provide guarantees to merchants after similar transactions such as "permanent package update" or "permanent technical support". Please make your own verification. 3. When the source code contains both website demonstrations and image demonstrations, and the website demonstrations and image demonstrations are inconsistent, the image demonstrations shall be taken as the basis for dispute judgment by default (unless otherwise specified or agreed upon). 4. In the absence of "no legitimate basis for refund", any statement such as "Once sold, no refund is supported" on the product shall be regarded as an invalid statement. 5. Before the auction, the transaction content agreed upon by both parties on QQ can also serve as the basis for judging disputes (in case of conflict between the agreement and the description, the agreement shall prevail). 6. Since chat records can be used as a basis for judging disputes, when both parties contact each other, they should only communicate with the QQ and mobile phone numbers left by the other party on the mutual website to prevent the other party from not acknowledging their self-commitment. 7. Although the probability of disputes arising from transactions is very low, it is essential to retain important information such as chat records and text messages on mobile phones to facilitate mutual intervention and quick handling in case of disputes. Huzhan Statement: 1. As a third-party intermediary platform, Huzhan ensures the security of transactions and the rights and interests of both buyers and sellers in accordance with the transaction contract (product description, contents agreed upon before the transaction). 2. For projects that are not traded online through the platform, any consequences arising therefrom shall have nothing to do with mutual sites. No matter what reason the seller has for requesting offline transactions, please contact the management to report it. Jinan Yiruan Network Technology Co., LTD. Location: Jinan, Shandong, China Merchant Type: Enterprise (Business license) Merchant Authentication:  contact seller source code technology:.nlj_62,.nlj_17,.nlj_42,.nlj_78,.nlj_8,.nlj_93 {display:none}; 21619780686605085181 wechat customer service SMS consultation Mutual Station IM service 4.98 efficiency 4.98 quality 4.97  visit the store  collect the store  the merchant has paid a deposit of 28,888.10 yuan in-store search for products: source code service search: price - Advertising, commercial advertising, rational choice advertising, official advertising, trustworthy. Our store's sales ranking 12025. Open source singles blind box, dating and friendship blind box. Open source code... 2 Genuine H5 anonymous letter source code and solution phone number, multiple templates, manual transmission... 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