My **Scholar / Mail**

I am a final-year undergraduate student at  **Beihang University.**

I will join PRLab@NJU as a PhD student in 2026, supervised by **Prof. Chenyang Si** .

I focus on Unified Multimodal Models (UMM).

Feel free to reach out via email.

Internship

[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.

Projects

Paper / Code / Weights

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.