I am a Researcher at Xiaomi MiMo. I was a PhD student at the Language Computing and Machine Learning Group (Lanco), Institute of Computational Linguistics (National Key Laboratory for Multimedia Information Processing), School of Computer Science, Peking University, supervised by Prof. Xu Sun. Before joining PKU, I received my Master of Science in Engineering from the University of Chinese Academy of Sciences (UCAS) under the guidance of Prof. Zheng Lin.
🔥 News
- 2026.01: VideoReasonBench got accepted by ICLR 2026!
- 2025.09: UVE got accepted by NeurIPS 2025 Datasets & Benchmarks Track!
Research Interests
- Multimodal Large Language Models
- Video Understanding
- Natural Language Processing
- Pre-trained Language Model Compression
📖 Educations
- Sept. 2022 - Jun. 2026: PhD student, majoring in Computer Software and Theory, Peking University.
- Sept. 2019 - Jun. 2022: M.S. in Computer Applied Technology, Institute of Information Engineering (IIE), CAS & UCAS.
- Sept. 2015 - Jun. 2019: B.S. in Communication Engineering, Beijing University of Posts and Telecommunications.
💻 Internships
- Research Intern at Xiaomi MiMo, Jan. 2026 - Now.
- Research Intern at Moonshot AI, Mar. 2025 - Dec. 2025. Mentor: Haoning Wu
- Research Intern at ByteDance Seed, July. 2024 - Mar. 2025. Mentor: Haoyuan Guo and Lu Jiang
- Research Intern at PRC, WeChat AI, Tencent Inc., Oct. 2020 - Jun. 2022. Mentor: Fandong Meng
📝 Selected Publications (Full List
)
Vision and Language
VIDEOREASONBENCH: Can MLLMs Perform Vision-Centric Complex Video Reasoning?
Yuanxin Liu, Kun Ouyang, Haoning Wu, Yi Liu, Lin Sui, Xinhao Li, Yan Zhong, Y. Charles, Xinyu Zhou, Xu Sun
Temporal Reasoning Transfer from Text to Video
Lei Li*, Yuanxin Liu*, Linli Yao, Peiyuan Zhang, Chenxin An, Lean Wang, Xu Sun, Lingpeng Kong, Qi Liu
TempCompass: Do Video LLMs Really Understand Videos?
Yuanxin Liu*, Shicheng Li*, Yi Liu, Yuxiang Wang, Shuhuai Ren, Lei Li, Sishuo Chen, Xu Sun, Lu Hou
UVE: Are MLLMs Unified Evaluators for AI-Generated Videos?
Yuanxin Liu, Lei Li, Shuhuai Ren, Rundong Gao, Shicheng Li, Sishuo Chen, Xu Sun and Lu Hou
FETV: A Benchmark for Fine-Grained Evaluation of Open-Domain Text-to-Video Generation
Yuanxin Liu, Lei Li, Shuhuai Ren, Rundong Gao, Shicheng Li, Sishuo Chen, Xu Sun and Lu Hou
SpaceR: Reinforcing MLLMs in Video Spatial Reasoning
Kun Ouyang, Yuanxin Liu, Haoning Wu, Yi Liu, Hao Zhou, Jie Zhou, Fandong Meng, Xu Sun
Aligning visual regions and textual concepts for semantic-grounded image representations
Fenglin Liu*, Yuanxin Liu*, Xuancheng Ren*, Xiaodong He, Xu Sun
Pre-trained Language Model Compression
A Win-win Deal: Towards Sparse and Robust Pre-trained Language Models
Yuanxin Liu, Fandong Meng, Zheng Lin, Jiangnan Li, Peng Fu, Yanan Cao, Weiping Wang and Jie Zhou
Learning to Win Lottery Tickets in BERT Transfer via Task-agnostic Mask Training
Yuanxin Liu, Fandong Meng, Zheng Lin, Peng Fu, Yanan Cao, Weipinng Wang and Jie Zhou
Marginal Utility Diminishes: Exploring the Minimum Knowledge for BERT Knowledge Distillation
Yuanxin Liu, Fandong Meng, Zheng Lin, Weiping Wang and Jie Zhou
ROSITA: Refined BERT cOmpreSsion with InTegrAted techniques
Yuanxin Liu, Zheng Lin, Fengcheng Yuan
🎖 Honors and Awards
- Outstanding Graduates of Beijing & UCAS, 2022
- CAS Presidential Excellent Scholarship, CAS, 2022
- National Scholarship for Master Students, Ministry of Education of P.R. China, 2021
- Merit Student, UCAS, 2021
- IIE Presidential Special Award, IIE, CAS, 2020
- Outstanding Graduates of Beijing, Beijing Municipal Education Commission, 2019
💬 Invited Talks
- 2025.03, NICE-NLP, Temporal Reasoning Transfer from Text to Video, Video (in Chinese)
Academic Service
- Area Chair/Action Editor: ACL ARR
- Reviewer: NeurIPS (2022, 2023, 2024, 2025), ICML (2022, 2023, 2024), ICLR (2024, 2025, 2026), EMNLP (2023), ACL (2023), CVPR (2024, 2025), Computational Linguistics
- Teaching assistant: Introduction to Natural Language processing (PKU, 2022 Fall), Natural Language processing (PKU, 2023, 2025 Fall)