About Me

I am currently a senior algorithm engineer at the Medical AI Lab, Alibaba DAMO Academy. Prior to that, I obtained my Ph.D. degree from the Chinese University of Hong Kong, under the supervision of Prof. Wai Lam. My research mainly lies in LLM/MLLM Reasoning, Data Augmentation/Synthesis, and Agent.

Education

• Aug. 2020 - July 2024, Ph.D.
  Department of Systems Engineering and Engineering Management,
  The Chinese University of Hong Kong
  

• Sep. 2015 - Jun. 2019, B.E.
  Computer Science from Yingcai Honors College,
  University of Electronic Science and Technology of China
  

Selected Publications

• Lingshu: A Generalist Foundation Model for Unified Multimodal Medical Understanding and Reasoning [paper][model]
  Weiwen Xu, Hou Pong Chan, Long Li, and 15 other authors
  

• Chain of ideas: Revolutionizing research via novel idea development with LLM agents [paper][code]
  Long Li, Weiwen Xu, Jiayan Guo, and 11 other authors
  

• FINEREASON: Evaluating and Improving LLMs’ Deliberate Reasoning through Reflective Puzzle Solving [paper][code]
  Guizhen Chen, Weiwen Xu, Hao Zhang, Hou Pong Chan, Chaoqun Liu, Lidong Bing, Deli Zhao, Anh Tuan Luu, Yu Rong
  ACL 2025

• Can We Further Elicit Reasoning in LLMs? Critic-Guided Planning with Retrieval-Augmentation for Solving Challenging Tasks [paper]
  Xingxuan Li, Weiwen Xu, Ruochen Zhao, Fangkai Jiao, Shafiq Joty, Lidong Bing
  ACL 2025

• Auto-Arena: Automating LLM Evaluations with Agent Peer Battles and Committee Discussions [paper][demo]
  Ruochen Zhao, Wenxuan Zhang, Yew Ken Chia, Weiwen Xu, Deli Zhao, Lidong Bing
  ACL 2025

• Reasoning Paths Optimization: Learning to Reason and Explore From Diverse Paths [paper][code]
  Yew Ken Chia, Guizhen Chen, Weiwen Xu, Luu Anh Tuan, Soujanya Poria, Lidong Bing
  EMNLP 2024 Findings

• Reasons to Reject? Aligning Language Models with Judgments [paper][code]
  Weiwen Xu, Deng Cai, Zhisong Zhang, Wai Lam, Shuming Shi
  ACL 2024 Findings

• From Clozing to Comprehending: Retrofitting Pre-trained Masked Language Model to Pre-trained Machine Reader [paper][code]
  Weiwen Xu, Xin Li, Wenxuan Zhang, Meng Zhou, Wai Lam, Luo Si, Lidong Bing
  NeurIPS 2023
  

• mPMR: A Multilingual Pre-trained Machine Reader at Scale [paper][code]
  Weiwen Xu, Xin Li, Wai Lam, Lidong Bing
  ACL 2023
  

• PeerDA: Data Augmentation via Modeling Peer Relation for Span Identification Tasks [paper][code]
  Weiwen Xu, Xin Li, Yang Deng, Lidong Bing, Wai Lam
  ACL 2023
  

• ConReader: Exploring Implicit Relations in Contracts for Contract Clause Extraction [paper][code]
  Weiwen Xu, Yang Deng, Wenqiang Lei, Wenlong Zhao, Tat-Seng Chua, Wai Lam.
  EMNLP 2022
  

• Exploiting reasoning chains for multi-hop science question answering [paper][code]
  Weiwen Xu, Yang Deng, Huihui Zhang, Deng Cai, Wai Lam.
  EMNLP 2021 Findings
  

• Dynamic Semantic Graph Construction and Reasoning for Explainable Multi-hop Science Question Answering [paper][code]
  Weiwen Xu, Huihui Zhang, Deng Cai, Wai Lam.
  ACL 2021 Findings
  

• Addressing the Vulnerability of NMT in Input Perturbations [paper]
  Weiwen Xu, Ai Ti Aw, Yang Ding, Kui Wu, Shafiq Joty.
  NAACL 2021 Industry Track
  

Professional Service

• Conference Reviwer: NeurIPS 2025, ICLR2025, ACL2021-2025, EMNLP2021-2025, NAACL2021-2022, SIGIR2023, IJCAI2023, ECIR2023
• Journal Reviewer: TACL, Knowledge-Based Systems, ACM Trans. on Web, Neurocomputing