About Me

I am a first-year PhD candidate at HKUST NLP Group supervised by Professor Junxian He. I graduated from Shanghai Jiao Tong University (SJTU) in June 2024, where I was also fortunate to be advised by Prof. Junxian He during my undergraduate studies.

Research Interests

My research focuses on natural language processing and machine learning, with particular emphasis on:

• LLM Reasoning and Reinforcement Learning
• Hallucination in Vision-Language Models (VLM)
• LLM truthfulness and Interpretability

Education

• Ph.D. in Computer Science (2024-Present)
  Hong Kong University of Science and Technology

• B.Eng. (2020-2024)
  Shanghai Jiao Tong University

Experience

• Research Intern (February 2025 - Present)
  MINIMAX

• Research Intern (June 2024 - September 2024)
  Tencent WXG
  Advisor: Zifei Shan

• Research Intern (June 2023 - December 2023)
  Shanghai AI Lab
  Advisor: Prof. Yu Cheng

Publications

2025

• On the Perception Bottleneck of VLMs for Chart Understanding
  Junteng Liu, Weihao Zeng, Xiwen Zhang, Yijun Wang, Zifei Shan, Junxian He (Arxiv)
  Code

2024

• On the Universal Truthfulness Hyperplane Inside LLMs
  Junteng Liu, Shiqi Chen, Yu Cheng, Junxian He
  Conference on Empirical Methods in Natural Language Processing (EMNLP 2024)
  Code

• In-Context Sharpness as Alerts: An Inner Representation Perspective for Hallucination Mitigation
  Shiqi Chen, Miao Xiong, Junteng Liu, Zhengxuan Wu, Teng Xiao, Siyang Gao, Junxian He
  International Conference on Machine Learning (ICML 2024)

2023

• C-Eval: A Multi-Level Multi-Discipline Chinese Evaluation Suite for Foundation Models
  Yuzhen Huang, Yuzhuo Bai, Zhihao Zhu, Junlei Zhang, Jinghan Zhang, Tangjun Su, Junteng Liu, Chuancheng Lv, Yikai Zhang, Jiayi Lei, Yao Fu, Maosong Sun, Junxian He
  Neural Information Processing Systems (NeurIPS 2023)

• Composing Parameter-Efficient Modules with Arithmetic Operations
  Jinghan Zhang, Shiqi Chen, Junteng Liu, Junxian He
  Neural Information Processing Systems (NeurIPS 2023)

Honors & Awards

• Zhiyuan Honor Scholarship, Shanghai Jiao Tong University

Contact

• Email: [jliugi@connect.ust.hk]
• GitHub: Vicent0205