I am currently a PhD student in the Department of Computing at The Hong Kong Polytechnic University, supervised by Prof. Hongxia Yang. Previously, I worked as a software engineer at Tencent for over two years. I received my Master’s Degree in Computer Technology from the School of Computer Science and Engineering at South China University of Technology in 2022, where I conducted research in the MLC Lab under the supervision of Prof. Wing W. Y. Ng. I obtained my Bachelor’s Degree in Industrial Engineering from the same university in 2019.

My current research interests primarily focus on Large Language Models (LLMs), with a particular emphasis on post-training.

Publications

• Not All Disagreement Is Learnable: Token Teachability in On-Policy Distillation
  Yuanyi Wang, Su Lu, Yanggan Gu, Pengkai Wang, Yifan Yang, Zhaoyi Yan, Congkai Xie, Jianmin Wu, Hongxia Yang
• Access Sets Matter: Budgeting Expert Reads for Scalable Weight-Space Model Merging
  Yuanyi Wang, Yanggan Gu, Su Lu, Yifan Yang, Zhaoyi Yan, Congkai Xie, Jianmin Wu, Hongxia Yang
  ICML 2026 Workshop on Weight-Space Symmetries
• Geometry Conflict: Explaining and Controlling Forgetting in LLM Continual Post-Training
  Yuanyi Wang, Yifan Yang, Su Lu, Yanggan Gu, Pengkai Wang, Wenjun Wang, Zhaoyi Yan, Congkai Xie, Jianmin Wu, Jialun Cao, Shing-Chi Cheung, Hongxia Yang
• FeatCal: Feature Calibration for Post-Merging Models
  Yanggan Gu, Shuo Cai, Zihao Wang, Wenjun Wang, Yuanyi Wang, Pengkai Wang, Sirui Huang, Su Lu, Jianmin Wu, Hongxia Yang
• InfiAlign: A Scalable and Sample-Efficient Framework for Aligning LLMs to Enhance Reasoning Capabilities
  Shuo Cai, Su Lu, Qi Zhou, Kejing Yang, Zhijie Sang, Congkai Xie, Hongxia Yang
• InfiR: Crafting Effective Small Language Models and Multimodal Small Language Models in Reasoning
  Congkai Xie, Shuo Cai, Wenjun Wang, Pengxiang Li, Zhijie Sang, Kejing Yang, Yiming Zhang, Zhen Li, Guanghao Zhu, Zeyu Liu, Yang Yu, Yuhang Liu, Su Lu, Baoyi He, Qi Zhou, Xiaotian Han, Jianbo Yuan, Shengyu Zhang, Fei Wu, Hongxia Yang
• SBHA: Sensitive binary hashing autoencoder for image retrieval
  IEEE Transactions on Cybernetics
  Ting Wang, Su Lu, Jianjun Zhang, Xuyu Liu, Xing Tian, Wing WY Ng, Wei-neng Chen

Honors and Awards

• 2021.09, Postgraduate Academic Scholarship, SCUT (Top 10%)
• 2020.09, Postgraduate Academic Scholarship, SCUT (Top 10%)
• 2019.09, First-Class Academic Scholarship, SCUT (Top 10%)
• 2017.09, Second-Class Academic Scholarship, SCUT (Top 10%)

Work Experience

• 2025.01 - 2025.12, Research Assistant, The Hong Kong Polytechnic University
• 2022.07 - 2024.11, Software Engineer (Backend Development), Tencent

Education

• 2026.01 - Present, PhD in Computer Science, The Hong Kong Polytechnic University
• 2019.09 - 2022.07, Master in Computer Technology, South China University of Technology
• 2015.09 - 2019.07, Bachelor in Industrial Engineering, South China University of Technology

Academic Service

• Conference: Reviewer for the NeurIPS

Teaching

• 2026 Spring, Teaching Assistant, COMP6713 - Advanced Large Language Models And Beyond, PolyU