Ph.D. Student

School of Data Science, CUHKSZ

Brief Bio

Hello! I am a Ph.D. student in the School of Data Science at The Chinese University of Hong Kong, Shenzhen (CUHKSZ), supervised by Professor Tongxin Li. My research interests focus on Generative Engine Optimization (GEO) & Marketing AI Agents, in-context decision making, and robust LLM applications.

Prior to that, I completed a Master’s degree at New York University (Courant Institute) in the USA and a 2+2 double Bachelor’s program at Queen’s University in Canada and Jilin University in China.

Interests

  • Generative Engine Optimization (GEO) & Marketing AI Agents

  • In-Context Decision Making, including in-context reasoning, in-context RL, and in-context control

  • Robust LLM Applications

Education

Recent News

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Experience

 
 
 
 
 
McGill University, Intelligent Automation Lab
Research Assistant
McGill University, Intelligent Automation Lab
Jul 2022 – Apr 2023 Canada
 
 
 
 
 
Tsinghua University, NLP Lab
NLP Algorithm Engineer
Tsinghua University, NLP Lab
Sep 2021 – Jun 2022 China
 
 
 
 
 
New York University (Courant Institute), CSCI-GA.1180 Mathematical Techniques for CS Applications
Course Lead
New York University (Courant Institute), CSCI-GA.1180 Mathematical Techniques for CS Applications
Jan 2021 – Jun 2021 USA
 
 
 
 
 
Amazon Web Services (AWS), Identity and Access Management
Full-Stack Software Engineer
Amazon Web Services (AWS), Identity and Access Management
Jun 2020 – Sep 2020 USA
 
 
 
 
 
Ben-Gurion University of the Negev
Visiting Scholar (Big Data & Cybersecurity)
Ben-Gurion University of the Negev
Jul 2018 – Aug 2018 Israel

Research

Fanzeng Xia, Hao Liu, Yisong Yue, and Tongxin Li Beyond Numeric Awards: In-Context Dueling Bandits with LLM Agents Findings of the Association for Computational Linguistics: ACL 2025, 9959–9988, 2024
Yuxin Lu, Tinko Sebastian Bartels, Rui Wu, Fanzeng Xia, Xinyu Wang, Yujie Wu, Haoxiang Yang, Tongxin Li Open In-Context Energy Management Platform Proceedings of the 16th ACM International Conference on Future Energy Markets, 2025
Yaqi Xu, Yuxuan Shi, Jiaming Tian, Fanzeng Xia, Tongxin Li, Shuo Chen, Yan Ge DCT-MARL: A Dynamic Communication Topology-Based MARL Algorithm for Connected Vehicle Platoon Control arXiv preprint arXiv:2508.12633, 2025
Yidong Luo, Chenyu Wang, Jinyu Yang, Fanzeng Xia, Tong Yu EVA-MILP: Towards Standardized Evaluation of MILP Instance Generation arXiv preprint arXiv:2505.24779, 2025
Fanzeng Xia, Yidong Luo, Tinko Sebastian Bartels, Yaqi Xu, Tongxin Li Rethinking the Unsolvable: When In-Context Search Meets Test-Time Scaling arXiv preprint arXiv:2505.22290, 2025
Fanzeng Xia, Alfonsus Rodriques Rendy, Nicholas Oh, Zoe Emmanuel Halim, Aaron Sasmita, Tinko Sebastian Bartels, Shaolei Ren, Tongxin Li Position: Towards Unified In-Context Reinforcement Learners

Positions

 
 
 
 
 
LinkRoad
Co-Founder & CEO
LinkRoad
Jan 2026 – Present China
 
 
 
 
 
A.I. For Anyone
Workshop Lead
A.I. For Anyone
Sep 2019 – Jun 2021 USA