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Xiaohongshu Tech REDtech
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Xiaohongshu Tech REDtech

Official account of the Xiaohongshu tech team, sharing tech innovations and problem insights, advancing together.

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Latest from Xiaohongshu Tech REDtech

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Xiaohongshu Tech REDtech
Xiaohongshu Tech REDtech
May 19, 2026 · Artificial Intelligence

Agent‑Driven R&D Efficiency: Exploration and Practice at QECon Shenzhen 2026

At QECon Shenzhen 2026, Xiaohongshu's tech team will present five technical talks that showcase how AI agents are applied to architecture risk analysis, change automation, large‑model load‑testing data construction, end‑to‑end testing, and client‑side performance, illustrating concrete engineering solutions and measurable productivity gains.

AI agentLLMPerformance
0 likes · 13 min read
Agent‑Driven R&D Efficiency: Exploration and Practice at QECon Shenzhen 2026
Xiaohongshu Tech REDtech
Xiaohongshu Tech REDtech
May 12, 2026 · Artificial Intelligence

Treating Automated Testing as AI Coding: Xiaohongshu GUI Agent Real‑World Review

During the 2026 Spring Festival promotion, Xiaohongshu replaced manual UI testing with a three‑layer AI‑driven GUI Agent that executed over 43,000 runs across 106 devices and 128 scenarios, achieving 58% automation, 82% AI‑generated case adoption, 68% bug recall, 98% stability and roughly $1 per test case while drastically cutting token costs.

AI codingCode-as-ActionGUI Agent
0 likes · 23 min read
Treating Automated Testing as AI Coding: Xiaohongshu GUI Agent Real‑World Review
Xiaohongshu Tech REDtech
Xiaohongshu Tech REDtech
May 11, 2026 · Artificial Intelligence

Building a New AI‑Driven Project Management Paradigm: The Redbook PMO’s Agentic Journey

The Xiaohongshu PMO team outlines four iterative versions of an AI‑powered project‑management agent—from a simple knowledge‑base consultant to a shared, role‑aware assistant with long‑memory and multi‑channel integration—detailing design principles, architectural choices, lessons learned, and a roadmap toward fully AI‑run project management.

AIAgentLong Memory
0 likes · 14 min read
Building a New AI‑Driven Project Management Paradigm: The Redbook PMO’s Agentic Journey
Xiaohongshu Tech REDtech
Xiaohongshu Tech REDtech
Apr 15, 2026 · Artificial Intelligence

How Relax Powers Scalable Multi‑Modal RL Training with Full‑Async Pipelines

Relax, an open‑source reinforcement‑learning engine from Xiaohongshu AI Platform, combines service‑oriented fault‑tolerant architecture, a distributed checkpoint service, and an asynchronous training pipeline to achieve up to 76% speed‑up and near‑zero overhead for multi‑modal RL workloads.

Asynchronous PipelineRay Servedistributed training
0 likes · 10 min read
How Relax Powers Scalable Multi‑Modal RL Training with Full‑Async Pipelines
Xiaohongshu Tech REDtech
Xiaohongshu Tech REDtech
Mar 4, 2026 · Mobile Development

How Xiaohongshu Delivered Billion‑User Voice & Fireworks Effects with Adaptive Rendering

During the 2026 Chinese New Year, Xiaohongshu built a real‑time dynamic interaction system that combined adaptive scheduling, high‑performance particle rendering, and industrial‑grade ASR to deliver synchronized voice greetings and emoji fireworks to over a billion daily active users across heterogeneous mobile devices.

ASRadaptive schedulingcross-platform
0 likes · 13 min read
How Xiaohongshu Delivered Billion‑User Voice & Fireworks Effects with Adaptive Rendering
Xiaohongshu Tech REDtech
Xiaohongshu Tech REDtech
Feb 5, 2026 · Databases

How RedSQL Supercharged MySQL Performance and Achieved Zero‑Data‑Loss Replication

This article details Xiaohongshu's RedSQL MySQL kernel project, describing three major solutions—high‑throughput seckill optimization, a Binlog Server‑based zero‑data‑loss replication scheme, and second‑level DDL column addition—along with additional kernel enhancements that together delivered multi‑fold performance gains and improved stability.

DDLData ConsistencyPerformance Optimization
0 likes · 12 min read
How RedSQL Supercharged MySQL Performance and Achieved Zero‑Data‑Loss Replication
Xiaohongshu Tech REDtech
Xiaohongshu Tech REDtech
Jan 30, 2026 · Backend Development

How Java Virtual Threads Cut Latency by 31× and Slash CPU Use in Production

This article explains the principles of Java virtual threads, compares them with traditional platform threads, details RedJDK21’s implementation and performance improvements—including up to 31‑fold latency reduction and 24% CPU savings—in large‑scale services at XiaoHongShu, and discusses migration challenges, lock handling, monitoring, and future roadmap.

JVMJavaPerformance Optimization
0 likes · 29 min read
How Java Virtual Threads Cut Latency by 31× and Slash CPU Use in Production
Xiaohongshu Tech REDtech
Xiaohongshu Tech REDtech
Jan 19, 2026 · Databases

How Merged Seckill Boosts MySQL Write Throughput 5× for High‑Traffic E‑Commerce

The article details a MySQL kernel‑level merged‑seckill optimization that replaces traditional queue‑based flash‑sale handling, achieving up to 5.5× higher TPS (up to 23,543 TPS on 128 threads) and sustaining 1.5W+ orders per second, while remaining transparent to applications and preserving compatibility with existing SQL.

CacheDatabaseLock
0 likes · 11 min read
How Merged Seckill Boosts MySQL Write Throughput 5× for High‑Traffic E‑Commerce
Xiaohongshu Tech REDtech
Xiaohongshu Tech REDtech
Jan 15, 2026 · Information Security

How Hi-Guard Improves Trustworthy Multimodal Content Moderation with Policy‑Aligned Reasoning

The Hi-Guard framework transforms content moderation by aligning multimodal models with policy rules through hierarchical prompting, a structured taxonomy, and soft‑margin reinforcement learning, achieving significant gains in accuracy, precision, recall, and explainability for large‑scale user‑generated content platforms.

content moderationexplainabilityhierarchical labeling
0 likes · 9 min read
How Hi-Guard Improves Trustworthy Multimodal Content Moderation with Policy‑Aligned Reasoning