Leyi Pan (潘乐怡)

👋 About Me

Hi! My name is Leyi Pan (潘乐怡). I am currently a 2nd-year Ph.D. student at the School of Software, Tsinghua University, advised by Prof. Lijie Wen. I received my B.Eng. from the same school in 2024.

I'm currently a research intern on reasoning, reinforcement learning and general agents at Tongyi Lab, Alibaba Group (mentored by Dr. Yunpeng Zhai). Previously I interned at Zhipu AI (Dr. Shiyu Huang) and served as Research Assistant at CUHK MISC Lab (Prof. Irwin King, ACM/IEEE/AAAI Fellow).

Research Interests

LLM Reasoning Reinforcement Learning Trustworthy AI LLM Watermarking Multimodal LLMs

📖 Education

Ph.D. in Computer Science 2024.09 – Present

School of Software, Tsinghua University

B.E. in Computer Science 2020.09 – 2024.06

School of Software, Tsinghua University

💻 Research Experience

Tongyi Lab, Alibaba Group 2025.07 – Present

Research Intern

Reasoning, reinforcement learning and agentic RL.
Mentor: Yunpeng Zhai

AI Lab, Zhipu AI 2024.10 – 2025.06

Research Intern

Reasoning for multimodal large language models.
Mentor: Shiyu Huang

The Chinese University of Hong Kong 2024.06 – 2024.08

Research Assistant · MISC Lab

Trustworthy AI.
Prof. Irwin King (ACM / IEEE / AAAI Fellow)

KuaiShou Technology 2023.06 – 2023.08

Research Intern

Tool-integrated agent.
Mentors: Haojie Pan, Ruiji Fu

📝 Selected Preprints

GLM-4.5 V and GLM-4.1 V-Thinking: Towards Versatile Multimodal Reasoning with Scalable Reinforcement Learning Zhipu

Zhipu AI (76 authors including Leyi Pan)

Omni-SafetyBench: A Benchmark for Safety Evaluation of Audio-Visual Large Language Models

Leyi Pan, Zheyu Fu, Yunpeng Zhai, Shuchang Tao, Sheng Guan, Shiyu Huang, Lingzhe Zhang, Zhaoyang Liu, Bolin Ding, Felix Henry, Aiwei Liu, Lijie Wen

MarkDiffusion: An Open-Source Toolkit for Generative Watermarking of Latent Diffusion Models

Leyi Pan, Sheng Guan, Zheyu Fu, Luyang Si, Huan Wang, Zian Wang, Hanqian Li, Xuming Hu, Irwin King, Philip S Yu, Aiwei Liu, Lijie Wen

A Survey on Parallel Text Generation: From Parallel Decoding to Diffusion Language Models

Lingzhe Zhang*, Liancheng Fang*, Chiming Duan*, Minghua He*, Leyi Pan*, Pei Xiao, Shiyu Huang, Yunpeng Zhai, Xuming Hu, Philip S Yu, Aiwei Liu

📝 Selected Publications Full List →

d-TreeRPO: Towards More Reliable Policy Optimization for Diffusion Language Models

Leyi Pan, Shuchang Tao, Yunpeng Zhai, Zheyu Fu, Liancheng Fang, Minghua He, Lingzhe Zhang, Zhaoyang Liu, Bolin Ding, Aiwei Liu, Lijie Wen

Can LLM Watermarks Robustly Prevent Unauthorized Knowledge Distillation?

Leyi Pan, Aiwei Liu, Shiyu Huang, Yijian Lu, Xuming Hu, Lijie Wen, Irwin King, Philip S Yu

WaterSeeker: Pioneering Efficient Detection of Watermarked Segments in Large Documents

Leyi Pan, Aiwei Liu, Yijian Lu, Zitian Gao, Yichen Di, Lijie Wen, Irwin King, Philip S Yu

MarkLLM: An Open-Source Toolkit for LLM Watermarking

Leyi Pan, Aiwei Liu, Zhiwei He, Zitian Gao, Xuandong Zhao, Yijian Lu, Binglin Zhou, Shuliang Liu, Xuming Hu, Lijie Wen, Irwin King, Philip S Yu

A Survey of Text Watermarking in the Era of Large Language Models

Aiwei Liu*, Leyi Pan*, Yijian Lu, Jingjing Li, Xuming Hu, Lijie Wen, Irwin King, Philip S Yu

A Semantic Invariant Robust Watermark for Large Language Models

Aiwei Liu, Leyi Pan, Xuming Hu, Shiao Meng, Lijie Wen

An Unforgeable Publicly Verifiable Watermark for Large Language Models

Aiwei Liu, Leyi Pan, Xuming Hu, Shuang Li, Lijie Wen, Irwin King, Philip S Yu

🏆 Honors & Awards

2025

Tsinghua Excellent First-class Scholarship

清华大学综合优秀一等奖学金

2024

Outstanding Graduate of Beijing

北京市优秀毕业生

2024

Outstanding Graduate of Tsinghua

清华大学优良毕业生

2024

Tsinghua Outstanding Graduation Project

清华大学优秀毕业设计

2021–23

Tsinghua Excellent Student Award

清华大学综合优秀奖学金

📬 Contact

🔍 Academic Services

Reviewer ACL ARR · NeurIPS · ICLR