I am a first-year PhD student at PRLab@NJU, advised by Prof. Chenyang Si. I received my B.Eng. degree from the School of Software, Beihang University.
Currently, I am interning at Meituan Longcat, working on Unified Multimodal Models (UMM).
Feel free to reach out via email.
[2026.01-Current] Meituan LongCat, focus on UMM, mentored by Qin Jie & Limeng Qiao.
[2025.07-2025.12] Shanghai AILab, focus on AI Safety, mentored by Jing Shao & Lijun Li.
ProGuard: Towards Proactive Multimodal Safeguard
Shaohan Yu*, Lijun Li*†, Chenyang Si, Lu Sheng, Jing Shao†
TLDR: a multimodal guardrails that can handle OOD scenarios by generating specific risk category names.
I feel deeply fortunate to have received guidance from wonderful mentors throughout my academic journey: Chenyang Si, Lu Sheng, Jing Shao, Lijun Li, Yueming Lyu, Qin Jie, Limeng Qiao, Haiwen Diao. Their support gave me the freedom to pursue the directions I genuinely care about. Inspired by them, I hope to do research that is open, meaningful, and worth sharing with the world.