Chujie Zheng
Also known as 郑楚杰
Chujie Zheng is a Qwen researcher whose work spans reinforcement learning for language models, Chinese dialogue, and mathematical reasoning evaluation. He studied mathematics, physics, and computer science at Tsinghua University and visited UCLA as a researcher hosted by Nanyun Peng. His work includes EVA, the Yi-Lightning report, ProcessBench, and Group Sequence Policy Optimization (GSPO), which Qwen applied in large-scale training of Qwen3 models; ACL included ProcessBench in its 2025 SAC Highlights. As of October 2026, he is a member of technical staff on the Qwen Team and leads the OPD team for post-training consolidation.
Timeline
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2016–2020
Mathematics and physics at Tsinghua
From 2016 to 2020, he studies mathematics and physics at Tsinghua University and earns a B.Sc. in both subjects.
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2020–2025
Doctoral study at Tsinghua
From 2020 to 2025, he pursues a Ph.D. in Computer Science and Technology at Tsinghua University with Minlie Huang as his adviser.
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2021
EVA dialogue system
In 2021, he coauthors EVA, a Chinese dialogue system whose pre-trained model has 2.8 billion parameters.
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November 2023–June 2024
Visiting research at UCLA
He works as a visiting researcher at UCLA from November 2023 to June 2024, with Nanyun Peng as his host.
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2024
Yi-Lightning technical report
In 2024, he coauthors the Yi-Lightning technical report, which presents a large language model that ranks sixth overall on Chatbot Arena.
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2025
ProcessBench for math reasoning
In 2025, he coauthors ProcessBench, a 3,400-case benchmark that tests whether models can identify errors in mathematical reasoning. ACL's 2025 SAC Highlights list the paper.
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2025
Qwen3 and GSPO training
In 2025, he coauthors the Qwen3 technical report and Group Sequence Policy Optimization (GSPO), a method for reinforcement learning with language models. Qwen applies GSPO to large-scale training of Qwen3 models.
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As of October 2026
Leading Qwen post-training work
As of October 2026, he is a member of technical staff on the Qwen Team, works on reinforcement learning scaling, and leads the OPD team for post-training consolidation.
Career
- NowQwen TeamMember of Technical Staff; OPD Team Lead
- 2023–2024University of California, Los AngelesVisiting Researcher
- 2020–2023State Key Laboratory of Intelligent Technology and Systems
- 2019–2025Beijing National Research Center for Information Science and Technology
Education
- 2025Tsinghua UniversityPh.D.
- 2020Tsinghua UniversityB.Sc.
Most-cited works
- Towards Emotional Support Dialog Systems
- CEM: Commonsense-Aware Empathetic Response Generation
- Qwen3 Technical ReportWith Baosong Yang, Beichen Zhang, Chengen Huang, Chenxu Lv, Fei Huang and Le Yu
- KdConv: A Chinese Multi-domain Dialogue Dataset Towards Multi-turn Knowledge-driven Conversation
- COLD: A Benchmark for Chinese Offensive Language DetectionWith Helen Meng
Sources and credits
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