Aug. 2025 - Jun. 2029 (expected)
The Chinese University of Hong Kong
Ph.D. student, MMLab
Supervisor: Prof. Xiangyu Yue.
Recipient of the Hong Kong PhD Fellowship Scheme.
Ph.D. Student, MMLab CUHK
Kaixuan Fan
My name is Kaixuan Fan (范凯旋). I am a 1st year PhD student at CUHK MultiMedia Lab, under the supervision of Prof. Xiangyu Yue. Before that, I obtained my bachelor degree at the School of Computer Science, Fudan University, advised by Prof. Zuxuan Wu and Prof. Yu-Gang Jiang. I have been a research intern at Mind Lab, Meituan LongCat Group, and Shanghai Artificial Intelligence Laboratory. My research interests lie in multimodal reasoning, agentic reinforcement learning, reward modeling, and generative models.
Background
Education
Sept. 2021 - Jun. 2025
Fudan University
Bachelor of Science in Computer Science and Technology
Supervisor: Prof. Zuxuan Wu and Prof. Yu-Gang Jiang.
GPA: 3.86/4.0.
Ranked 1/101 in the Department of Computer Science.
Ranked 1/195 in the School of Computer Science.
Selected Work
Publications
SophiaVL-R1: Reinforcing MLLMs Reasoning with Thinking Reward
Kaixuan Fan*, Kaituo Feng*, Haoming Lyu, Dongzhan Zhou, Xiangyu Yue.
International Conference on Learning Representations, 2026.
Exploring Reasoning Reward Model for Agents
Kaixuan Fan, Kaituo Feng, Manyuan Zhang, Tianshuo Peng, Zhixun Li, Yilei Jiang, Shuang Chen, Peng Pei, Xunliang Cai, Xiangyu Yue.
Findings of the Annual Meeting of the Association for Computational Linguistics, 2026.
Diffusion Autoencoders for Few-shot Image Generation in Hyperbolic Space
Lingxiao Li, Kaixuan Fan, Boqing Gong, Xiangyu Yue.
International Conference on Computer Vision, 2025.
OneThinker: All-in-one Reasoning Model for Image and Video
Kaituo Feng, Manyuan Zhang, Hongyu Li, Kaixuan Fan, Shuang Chen, Yilei Jiang, Dian Zheng, Peiwen Sun, Yiyuan Zhang, Haoze Sun, Yan Feng, Peng Pei, Xunliang Cai, Xiangyu Yue.
IEEE/CVF Conference on Computer Vision and Pattern Recognition, 2026.
Gen-Searcher: Reinforcing Agentic Search for Image Generation
Kaituo Feng, Manyuan Zhang, Shuang Chen, Yunlong Lin, Kaixuan Fan, Yilei Jiang, Hongyu Li, Dian Zheng, Chenyang Wang, Xiangyu Yue.
arXiv preprint.
OpenGame: Open Agentic Coding for Games
Yilei Jiang, Jinyuan Hu, Qianyin Xiao, Yaozhi Zheng, Ruize Ma, Kaituo Feng, Jiaming Han, Tianshuo Peng, Kaixuan Fan, Manyuan Zhang, Xiangyu Yue.
arXiv preprint.
Positions
Internship
May 2026 - Present
Research Intern, Mind Lab (Remote)
Post-trained GLM-5.1 and GLM-5.2 for tool use and code generation; contributor to Macaron-v1-preview and Macaron-v1.
Mentor: Dr. Xiaoteng Ma
Sept. 2025 - Apr. 2026
LongCat Group Intern, Meituan Inc.
Mentor: Dr. Manyuan Zhang
Oct. 2024 - Jun. 2025
AI for Science Intern, Shanghai Artificial Intelligence Laboratory
Mentor: Dr. Dongzhan Zhou
Recognition
Honors and Awards
- 2025 Hong Kong PhD Fellowship Scheme
- 2024, 2022 China National Scholarship
- 2024 Meritorious Winner, Mathematical Contest in Modeling
- 2023 Scholarship for Outstanding Students at Fudan University
Tools
Skills
Programming
Python, NumPy, PyTorch, Matplotlib, C, C++, SystemVerilog, LaTeX
Languages
IELTS 7.5 overall
CET-6 666