Xintong Wang (王鑫同) Research Fellow Language Technology Group Department of Informatics, Universität Hamburg Vogt-Kölln-Straße 30, 22527 Hamburg Email: xintong.wang@uni-hamburg.de   or  m.e.xintong@gmail.com [Github]   [Google Scholar]   [Twitter]

I received my Ph.D. from University of Hamburg (Universität Hamburg/Exzellenzuniversitäten), advised by Prof. Chris Biemann. Previously, I received my M.Eng. degree and B.Eng. degree from the School of Computer Science and Engineering, South China University of Technology (Double First-Class Universities and Disciplines) in 2019 and 2016, respectively.

📣 Opening: We are hiring student assistants at the University of Hamburg and full-time positions & interns at Alibaba. Self-motivated students with experience in LLMs, LVLMs, and Agents are welcome to reach out. Please feel free to drop me an email. I’m always open to collaborations.

Research

My research focuses on large language models and agentic systems, with an emphasis on training and alignment, evaluation and interpretability, and multilingual and multimodal learning for real-world applications.

News

• 🎉 Aug. 2025: One paper accepted to EMNLP 2025 (Main 🔥Top 15%)!
• 🎉 May 2025: Three papers accepted to ACL 2025!
• 😊 Dec. 2024: I will serve as an Area Chair for ACL ARR!
• 🎉 Nov. 2024: One paper accepted to COLING 2025 (Oral)!
• 🎉 May 2024: One paper accepted to ACL 2024 (Findings)!
• 🎉 Mar. 2024: One paper accepted to LREC-COLING: NeusymBridge 2024!
• Aug. 2023: Co-organizer of CLEF-2024 SemEval Task: Multilingual Text Detoxification
• 🎉 Jul. 2023: One paper accepted to ECAI 2023!
• Jun. 2023: Invited talk at the University of Wuppertal.
• Dec. 2022: Visiting Researcher at the Institute of Psychology, Chinese Academy of Sciences.
• Jun. 2022: Attending LREC 2022.
• 🎉 May 2022: One paper accepted to LREC 2022!
• Apr. 2021: Ph.D. Candidate at the University of Hamburg.

Experiences

• 2022/12 - 2023/03: Visiting scholar at Chinese Academy of Sciences (Advisor: Prof. Xingshan Li)
• 2020/05 - 2021/04: Research associate at Universität Hamburg (Advisor: Prof. Chris Biemann)
• 2018/10 - 2019/08: Research assistant at PolyU (Advisor: Prof. Maggie Wenjie Li)
• 2018/03 - 2018/09: Visiting student at SIAT, Chinese Academy of Sciences (Advisor: Prof. Min Yang)

Selected Publications

2025

• Chinese Toxic Language Mitigation via Sentiment Polarity Consistent Rewritess
  Xintong Wang, Yixiao Liu, Jingheng Pan, Liang Ding, Longyue Wang, and Chris Biemann. 2025
  The 2025 Conference on Empirical Methods in Natural Language Processing (EMNLP 2025). (CORE Rank A* Top 15%)
  

• CogSteer: Cognition-Inspired Selective Layer Intervention for Efficiently Steering Large Language Models
  Xintong Wang, Jingheng Pan, Liang Ding, Longqin Jiang, Longyue Wang, Xingshan Li, and Chris Biemann.
  Findings of the Association for Computational Linguistics (ACL 2025). (CORE Rank A*)
  

2024

• Mitigating Hallucinations in Large Vision-Language Models with Instruction Contrastive Decoding
  Xintong Wang, Jingheng Pan, Liang Ding, and Chris Biemann.
  Findings of the Association for Computational Linguistics (ACL 2024). (CORE Rank A*)
  

• Probing Large Language Models from A Human Behavioral Perspective
  Xintong Wang, Xiaoyu Li, Xingshan Li, and Chris Biemann.
  Proceedings of Bridging Neurons and Symbols for Natural Language Processing and Knowledge Graphs Reasoning (Neusymbridge) at the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING 2024).
  

2023

• Using Self-Supervised Dual Constraint Contrastive Learning for Cross-modal Retrieval
  Xintong Wang, Xiaoyu Li, Liang Ding, Sanyuan Zhao, and Chris Biemann.
  European Conference on Artificial Intelligence 2023 (ECAI 2023). (CORE Rank A 24%)
  

2022

• MOTIF: Contextualized Images for Complex Words to Improve Human Reading
  Xintong Wang*, Florian Schneider*, Özge Alaçam, Prateek Chaudhury, and Chris Biemann.
  Language Resources and Evaluation Conference 2022 (LREC 2022). (CORE Rank B) [Dataset]
  

Team

Ph.D. Students

• Jingheng Pan, University of Hamburg, 2025-2028, Agentic LVLM
• Yixiao Liu, University of Hamburg, 2026-2029, Multimodal Reasoning

Master Students

• Ouyangzi Ye, Zhejiang University, 2026, Agent Tool Use
• Jingfan Xin, University of Hamburg, 2025, GUI Agent
• Longqin Jiang, University of Hamburg, 2025, Multilingual LVLM

Previous Students

• Fabian Meyer (Uni. Hamburg), Anton Orell Wiehe (Uni. Hamburg), Xiaoyu Li (TU Berlin), Matthew Ng Cher-Wai (Uni. Hamburg), Prateek Chaudhury (IIT Delhi), and more

Professional Activities

Invited Talks

• Probing Large Language Models (LLMs) for Predicting Human Behavioral Data, June 2023, University of Wuppertal

Teaching Assistant

• Instructor for Deep Learning for Natural Language Processing, Winter 2024/2025, University of Hamburg
• Project mentor for Master Project Web Interfaces for Language Processing Systems, Summer 2022/2023, University of Hamburg
• Instructor for Natural Language Processing for Web, Winter 2020, University of Hamburg

Academic Services

• Area Chair: ACL ARR

• Conference Reviewer: ACL 26', CVPR 26', AISTATS 25', NAACL 25', COLING 25', NeurIPS 25', ACM MM 24', ECCV 24', ACL 24', NAACL 24', LREC-COLING 24', CVPR24', IJCNLP-AACL'23, ACM MM23', ECAI 23', AACL'22, ARR'22, EMNLP'22, ARR'21, ACL'21, NAACL'21, IJCAI'21(SPC), ACL'20, EMNLP'20, AACL-IJCNLP'20

• Session Chair of ECAI-2023.
• Senior Program Committee of IJCAI-2021.
• Program Committee of Multimodal and Multilingual Hate Speech Detection workshop at KONVENS 2021.

Misc.

🐈I have a cat called Minus. His name is a German word (subtraction/minus), with my direct hope that he can live in an easy mode.