Ziqian Zhang

Currently I am a M.Sc. student of School of Artificial Intelligence in Nanjing University and a member of LAMDA Group, led by professor Zhi-Hua Zhou.

I received my B.Sc. degree from Kuang Yaming Honors School, Nanjing University in June 2023. In September 2023, I was admitted to pursue a M.Sc. degree in Nanjing University, under the supervision of Professor Yang Yu.

CV  |  Email  |  GitHub  |  Linkedin  |  Google Scholar  |  Lab Homepage

profile photo
News
  • [May, 2025] Lapse was accepted to ICML'25. Also congrats to Lihe on the acceptance of SemDiv.👏
  • [May, 2024] DASaR was accepted to ECML PKDD'24. Huge congrats to Ruiqi!👏
  • [Apr, 2024] MACPro and CORe3 were accepted to TNNLS and IJCAI'24, respectively. Huge congrats to Lihe!🎉
  • [Dec, 2023] Macop was accepted to DAI'23' (Best Paper Award)!
  • [May, 2023] Fastap was accepted to UAI'23.
  • [Nov, 2022] ROMANCE was accepted to AAAI'23 (oral)! 🎉🥳
Research [Google Scholar]

My research interest lies in Reinforcement Learning and Multi-Agent Systems. My long-term goal is to improve the safety and robustness of the multi-agent system and enable real-world multi-agent decision-making.

profile photo Learning to Reuse Policies in State Evolvable Environmentsng
Ziqian Zhang*, Bohan Yang*, Lihe Li, Yuqi Bian, Ruiqi Xue, Feng Chen, Yi-Chen Li, Lei Yuan, Yang Yu
Forty-Second International Conference on Machine Learning (ICML), 2025
paper | code

profile photo Efficient multi-agent offline coordination via diffusion-based trajectory stitching
Lei Yuan, Yuqi Bian, Lihe Li, Ziqian Zhang, Cong Guan, Yang Yu
The Thirteenth International Conference on Learning Representations (ICLR), 2025
paper

profile photo Dynamics Adaptive Safe Reinforcement Learning with a Misspecified Simulator
Ruiqi Xue, Ziqian Zhang, Lihe Li, Feng Chen, Yi-Chen Li, Yang Yu, Lei Yuan
Joint European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD), 2024
paper

profile photo Continual Multi-Objective Reinforcement Learning via Reward Model Rehearsal
Lihe Li, Ruotong Chen, Ziqian Zhang, Zhichao Wu, Yi-Chen Li, Cong Guan, Yang Yu, Lei Yuan.
International Joint Conference on Artificial Intelligence (IJCAI), 2024
paper | code

profile photo One by One, Continual Coordinating with Humans via Hyper-Teammate Identification
Cong Guan, Feng Chen, Ke Xue, Chunpeng Fan, Lichao Zhang, Ziqian Zhang, Pengyao Zhao, Zongzhang Zhang, Chao Qian, Lei Yuan, Yang Yu.
Transactions on Machine Learning Research (TMLR), 2024.
paper | code

profile photo Cost-aware Offline Safe Meta Reinforcement Learning with Robust In-Distribution Online Task Adaptation.
Cong Guan, Ruiqi Xue, Ziqian Zhang, Lihe Li, Yi-Chen Li, Yang Yu,
International Conference on Autonomous Agents and Multiagent Systems (AAMAS), 2024
paper | code

profile photo A Survey of Progress on Cooperative Multi-agent Reinforcement Learning in Open Environment
Lei Yuan, Ziqian Zhang, Lihe Li, Cong Guan, Yang Yu,
paper

profile photo Learning to Coordinate with Anyone
Lei Yuan, Lihe Li, Ziqian Zhang, Feng Chen, Tianyi Zhang, Cong Guan, Yang Yu, Zhi-Hua Zhou.
Distributed Artificial Intelligence (DAI), 2023 (Best Paper Award)
paper | code | talk

profile photo Fast Teammate Adaptation in the Presence of Sudden Policy Change
Ziqian Zhang*, Lei Yuan*, Lihe Li, Ke Xue, Chengxing, Jia, Cong Guan, Chao Qian, Yang Yu.
Uncertainty in Artificial Intelligence (UAI), 2023
paper | talk

profile photo Multi-agent Continual Coordination via Progressive Task Contextualization
Lei Yuan, Lihe Li, Ziqian Zhang, Fuxiang Zhang, Cong Guan, Yang Yu.
IEEE Transactions on Neural Networks and Learning Systems (TNNLS)
paper | code

profile photo Robust Multi-Agent Coordination via Evolutionary Generation of Auxiliary Adversarial Attackers
Lei Yuan*, Ziqian Zhang*, Ke Xue, Hao Yin, Feng Chen, Lihe Li, Cong Guan, Chao Qian, Yang Yu.
AAAI Conference on Artificial Intelligence (AAAI), 2023
paper | code

profile photo UniRLTest: universal platform-independent testing with reinforcement learning via image understanding
Ziqian Zhang*, Yulei Liu*, Shengcheng Yu, Xin Li, Yexiao Yun, Chunrong Fang, Zhenyu Chen.
ACM SIGSOFT International Symposium on Software Testing and Analysis (ISSTA), 2022
paper

Project

Offline MARL framework - OffPyMARL: OffPyMARL provides unofficial and benchmarked PyTorch implementations for selected Offline MARL algorithms.

Work Experience
profile photo Ubiquant
Quant Research Intern (02.2025-Now)
Beijing, China
Education
NJU logo NanJing University
M.S. in Artificial Intelligence (2023 - 2026)
NJU logo Nanjing University
B.S. in Brain Science and Artificial Intelligence, Kuang Yaming Honors School (2019 - 2023)
Overall GPA: 91.8/100, Ranking: 1/18
Services
  • Conference reviewer: ICML 2025
  • Conference reviewer: ICLR 2025
Friends and Main Collaborators

  • Feng Chen, M.sc. student at Nanjing University
  • Lihe Li, M.sc. student at Nanjing University
  • Yi-Chen Li, Ph.D. student at Nanjing University
  • Lei Yuan, Assistant Researcher at Nanjing University
Miscellanea
  • My Chinese Name (surname first): 张子谦 (Zhang Ziqian). 张 is one of the most common surnames in China, and "子谦" means "a modest, self-disciplined gentleman".
  • I am from Yangzhou, Jiangsu Province in China. I've also lived in Nanjing, amd Hangzhou.
  • I have the fortune to work with brilliant people during my research journey and I am truly grateful for their guidance and help!

Website Template