Wenxuan Liu, a Senior Machine Learning Engineer and Tech Lead at ByteDance’s TikTok, is deeply involved in developing the platform’s AI systems, focusing on recommendation systems, content understanding, large-scale machine learning systems, and generative AI deployment. Since joining TikTok, Liu has contributed to core algorithm optimization for global recommendation systems, AI system development for content understanding and risk identification, AI-driven content safety and governance systems, and generative AI applications in platform operations. His responsibilities include key system architecture design, technical roadmap execution, and implementation of core platform capabilities, requiring a balance among algorithmic performance, system scalability, engineering stability, and business adaptability. A representative initiative is the development of TikTok’s AI system for content risk sensing, which addresses governance challenges related to content velocity, cross-regional dissemination, and multi-source information flows as the platform’s business scale expands. This system is part of a broader governance capability upgrade, valued for identifying potential risk events.