Academic

Publications

Research at FudanNLP Alex Lab, advised by Prof. Yixin Cao (since October 2025).

• Aug 2026

  Disagree to Explore, Agree to Commit: Routing-Guided Test-Time Scaling for Software Agents

  Kang Chen^*, Junjie Nian^*, Yixin Cao, Yugang Jiang Preprint, 2026 arXiv Code
• Jun 2026

  Does the Same Token Mean the Same State? MoE Routing as Signal for Reasoning Control

  Kang Chen, Minshen Yu, Junjie Nian, Yaoning Wang, Yixin Cao, Yugang Jiang Preprint, 2026 arXiv Website
• May 2026

  TraceGraph: Shared Decision Landscapes for Diagnosing and Improving Agent Trajectories

  Junjie Nian^*, Kang Chen^*, Ge Zhang, Yixin Cao, Yugang Jiang Preprint, 2026 arXiv Code Trajectory Lens →
• May 2026

  SliceGraph: Mapping Process Isomers in Multi-Run Chain-of-Thought Reasoning

  Kang Chen^*, Junjie Nian^*, Yixin Cao, Yugang Jiang Preprint, 2026 arXiv Code
• Feb 2026

  NEX: Neuron Explore-Exploit Scoring for Label-Free Chain-of-Thought Selection and Model Ranking

  Kang Chen^*, Zhuoka Feng^*, Sihan Zhao, Kai Xiong, Junjie Nian, Yaoning Wang, Changyi Xiao, Yixin Cao Preprint, 2026 arXiv
• Jan 2026

  Thinking Traps in Long Chain-of-Thought: A Measurable Study and Trap-Aware Adaptive Restart

  Kang Chen^*, Fan Yu^*, Junjie Nian, Sihan Zhao, Zhuoka Feng, Zijun Yao, Heng Wang, Minshen Yu, Yixin Cao ACL 2026 Findings arXiv ACL Anthology
• Jan 2026

  ARM: Role-Conditioned Neuron Transplantation for Training-Free Generalist LLM Agent Merging

  Zhuoka Feng^*, Kang Chen^*, Sihan Zhao^†, Kai Xiong^†, Yaoning Wang^†, Minshen Yu, Junjie Nian, Changyi Xiao, Yixin Cao, Yugang Jiang EMNLP 2026 Oral arXiv Website

* Equal contribution    † Equal second-author contribution

Honors and Awards

• 2025 Third Prize, The Chinese Mathematics Competitions for College Students, Shanghai
• 2025 Third Prize, China Undergraduate Mathematical Contest in Modelling, Shanghai
• 2025 Duckbill Corporate-Sponsored Scholarship (Fudan University)
• 2024 Tengfei College Freshman Scholarship (Fudan University)
• 2024 Fudan University Freshman Scholarship