Zeyu Xia | TSAIL, Tsinghua University

Biography

Zeyu Xia is a first-year Ph.D. student in the TSAIL Group at Tsinghua University. He is advised by Prof. Hang Su and Prof. Jun Zhu, and works closely with Dong Yan and Dongzhan Zhou.

Research Interests

His research centers on LLM post-training and the construction of agent systems, with a particular focus on their applications in science. Beyond AI for Science, he is also interested in incorporating scientific knowledge into model training, including LLMs and embodied models, to improve performance and generalization.

Education

Ph.D. in Computer Science, Tsinghua University, 2025-present.
B.S. in Basic Science of Mathematics and Physics, Tsinghua University, 2021-2025.
Secondary degree in Materials Science and Engineering, Tsinghua University, 2021-2025.

Publications

arXiv

FunctionEvolve: Structure-Guided Symbolic Regression with LLMs

Zeyu Xia, Jun Zhu, Dong Yan

arXiv preprint, 2026.

PDF Code

ICLR

Helix: Evolutionary Reinforcement Learning for Open-Ended Scientific Problem Solving

Chang Su, Zhongkai Hao, Zhizhou Zhang, Zeyu Xia, Youjia Wu, Hang Su, Jun Zhu

International Conference on Learning Representations (ICLR), 2026.

PDF Code Poster

arXiv

An Agentic Framework for Autonomous Materials Computation

Zeyu Xia, Jinzhe Ma, Congjie Zheng, Shufei Zhang, Yuqiang Li, Hang Su, P. Hu, Changshui Zhang, Xingao Gong, Wanli Ouyang, Lei Bai, Dongzhan Zhou, Mao Su

arXiv preprint, 2025.

PDF Code

ICML

STAIR: Improving Safety Alignment with Introspective Reasoning

Yichi Zhang, Siyuan Zhang, Yao Huang, Zeyu Xia, Zhengwei Fang, Xiao Yang, Ranjie Duan, Dong Yan, Yinpeng Dong, Jun Zhu

International Conference on Machine Learning (ICML), 2025.

PDF Code Oral Presentation

NeurIPS

PINNacle: A Comprehensive Benchmark of Physics-Informed Neural Networks for Solving PDEs

Zhongkai Hao, Jiachen Yao, Chang Su, Hang Su, Ziao Wang, Fanzhi Lu, Zeyu Xia, Yichi Zhang, Songming Liu, Lu Lu, Jun Zhu

Advances in Neural Information Processing Systems (NeurIPS) Datasets and Benchmarks Track, 2024.

PDF Code Poster

Misc

Xia loves music and sports. He is also an amateur photographer and a fan of traditional Chinese culture, especially poetry and history (see his Xiaohongshu).