Chujie Zheng 郑楚杰

I am a researcher in the Qwen Team and a final-year Ph.D candidate at Tsinghua University, advised by Prof. Minlie Huang.

I am dedicated to building scalable, generalist AI systems. My expertise is mainly centered on data and algorithms, while I’m also actively developing skills related to infrastructure.

• My current work focuses on advancing the reasoning capabilities of Qwen models (e.g., Qwen3, QwQ) through large-scale reinforcement learning (RL), enabling them to tackle increasingly complex tasks.
• My research interests also broadly include model architecture design, interpretability and dynamics, as well as trustworthiness and alignment.
• Previously, I conducted extensive research on LLMs for social good, with a main focus on building emotional support systems.

You can find my CV here.

News

• [05/2025] The ExPO, ProcessBench, and Qwen2.5-Math-PRM papers are accepted to ACL 2025
• [04/2025] Release the Qwen3 series foundation models [blog] [🤗 model] [chat]
• [03/2025] Release the QwQ-32B reasoning model [blog] [🤗 model] [🤗 demo]
• [01/2025] Release Qwen2.5-Math-PRM for process supervision in mathematical reasoning [paper] [🤗 model]
• [12/2024] Release ProcessBench for process supervision in mathematical reasoning [paper] [repo] [🤗 data]
• [12/2024] Release the Yi-Lightning technical report [paper]
• [11/2024] Release the QwQ-32B-Preview reasoning model [blog] [🤗 model] [🤗 demo]
• [10/2024] Release Yi-Lightning, which ranks #6 on Chatbot Arena (as of 10/14/2024)
• [05/2024] The DRO paper is accpeted to ICML 2024
• [04/2024] Release the paper of model extrapolation (ExPO) for efficient LLM alignment [paper]
• [01/2024] Release the paper of safety prompt optimization (DRO) for LLM safeguarding [paper]
• [01/2024] The PriDe paper is accpeted to ICLR 2024 as a Spotlight (5%)
• [11/2023] Start my visiting research at UCLA, hosted by Nanyun (Violet) Peng
• [09/2023] Release the paper of LLM debiasing (PriDe) in multiple-choice QA [paper]

Selected Projects

You can find my full paper list on Google Scholar.

1. Qwen3: Think Deeper, Act Faster
   Qwen Team
   [blog] [🤗 model] [chat]
2. QwQ-32B: Embracing the Power of Reinforcement Learning
   Qwen Team
   [blog] [🤗 model] [🤗 demo]
3. QwQ: Reflect Deeply on the Boundaries of the Unknown
   Qwen Team
   [blog] [🤗 model] [🤗 demo]
4. Model Extrapolation Expedites Alignment
   Chujie Zheng, Ziqi Wang, Heng Ji, Minlie Huang, Nanyun Peng
   ACL 2025
   [paper] [repo] [🤗 model] (140K+ downloads)
5. ProcessBench: Identifying Process Errors in Mathematical Reasoning
   Chujie Zheng, Zhenru Zhang, Beichen Zhang, Runji Lin, Keming Lu, Bowen Yu, Dayiheng Liu, Jingren Zhou, Junyang Lin
   ACL 2025
   [paper] [repo] [🤗 data]
6. The Lessons of Developing Process Reward Models in Mathematical Reasoning
   Zhenru Zhang, Chujie Zheng, Yangzhen Wu, Beichen Zhang, Runji Lin, Keming Lu, Bowen Yu, Dayiheng Liu, Jingren Zhou, Junyang Lin
   Findings of ACL 2025
   [paper] [🤗 model]
7. Yi-Lightning Technical Report
   01.AI
   [paper]
8. On Prompt-Driven Safeguarding for Large Language Models
   Chujie Zheng, Fan Yin, Hao Zhou, Fandong Meng, Jie Zhou, Kai-Wei Chang, Minlie Huang, Nanyun Peng
   ICML 2024
   [paper] [repo]
9. Large Language Models Are Not Robust Multiple Choice Selectors
   Chujie Zheng, Hao Zhou, Fandong Meng, Jie Zhou, Minlie Huang
   ICLR 2024 (Spotlight: 5%)
   [paper] [repo]
10. Chat Templates for 🤗 HuggingFace Large Language Models
    Chujie Zheng
    GitHub Repository (600+ stars)
    [repo]

Education

• Aug 2020 – present. Ph.D candidate in Computer Science and Technology, Tsinghua University. Advisor: Minlie Huang
• Nov 2023 – Jun 2024. Visiting Researcher, University of California, Los Angeles. Host: Nanyun Peng
• Aug 2016 – Jul 2020. B.Sc. in Foundational Mathematics and Physics, Tsinghua University

Work Experiences

• Oct 2024 – Present. Researcher. Qwen Team, Alibaba Group
  • Built the Qwen3 series foundation models
  • Built the QwQ series reasoning models
  • Built ProcessBench and Qwen2.5-Math-PRM for process supervision in mathematical reasoning
• Jul 2024 – Oct 2024. Research Intern. 01.AI
  • Built Yi-Lightning, which ranks #6 on Chatbot Arena (as of 10/14/2024)
• Feb 2022 – Jun 2022. Research Intern. Baidu

Services

• Area Chair: ACL (24/25), EMNLP (24/25), NAACL (25), ACL Rolling Review (24/25)
• Reviewer: ICLR (25), NeurIPS (24/25), ICML (24), COLM (24/25), ACL (22/23), EMNLP (21/22), NAACL (24), EACL (23), ACL Rolling Review (21/22/23), CogSci (24), AAAI (22/23)

Awards and Honors

• Comprehensive Merit Scholarship, Tsinghua University, 2021 – 2024
• Outstanding Undergraduate, Tsinghua University, 2020
• National Scholarship (Top 2/100), Ministry of Education of China, 2019