Yilong Wang

M.Sc. student in Computer Science · TU Berlin

I am a master's student in computer science at TU Berlin, supervised by Qianli Wang. I wrote my bachelor's thesis with Qianli Wang and Nils Feldhus.

My research currently focuses on multilingual language models, LLM agents, post-training, and looped transformers. My earlier work studied interpretability and counterfactual explanations for multilingual models.

Looking for internship and PhD positions starting in 2027. Feel free to reach out by email.

Portrait of Yilong Wang

Education

News

Publications

* Equal contribution.

From Concept Alignment to Causal Grounding: An Intervention Test of Chain-of-Thought Faithfulness

Qianli Wang, Yilong Wang, Dennis Wei, Jingyi Sun, Simon Ostermann, Isabelle Augenstein, Pepa Atanasova, Nils Feldhus

arXiv 2026In submission arXiv/ PDF/

@misc{wang2026conceptalignmentcausalgrounding,
      title={From Concept Alignment to Causal Grounding: An Intervention Test of Chain-of-Thought Faithfulness}, 
      author={Qianli Wang and Yilong Wang and Dennis Wei and Jingyi Sun and Simon Ostermann and Isabelle Augenstein and Pepa Atanasova and Nils Feldhus},
      year={2026},
      eprint={2609.23065},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2609.23065}, 
}

Macro: Enhancing Multilingual Counterfactual Explanations through Alignment-as-Preference Optimization

Yilong Wang*, Qianli Wang*, Bohao Chu, Yihong Liu, Jing Yang, Simon Ostermann

EMNLP 2026Findings arXiv/ PDF/

@misc{wang2026macroenhancingmultilingualcounterfactual,
      title={Macro: Enhancing Multilingual Counterfactual Explanations through Alignment-as-Preference Optimization}, 
      author={Yilong Wang and Qianli Wang and Bohao Chu and Yihong Liu and Jing Yang and Simon Ostermann},
      year={2026},
      eprint={2605.11632},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2605.11632}, 
}

iFlip: Iterative Feedback-driven Counterfactual Example Refinement

Yilong Wang*, Qianli Wang*, Nils Feldhus

EMNLP 2026Findings arXiv/ PDF/

@misc{wang2026iflipiterativefeedbackdrivencounterfactual,
      title={iFlip: Iterative Feedback-driven Counterfactual Example Refinement}, 
      author={Yilong Wang and Qianli Wang and Nils Feldhus},
      year={2026},
      eprint={2601.01446},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2601.01446}, 
}

Projects

Open source

Apache SystemDS Contributor May to July 2026 · completed

I contributed to LLM-assisted generation of data augmentation pipelines, building a harness that compared published augmentation baselines against LLM-generated strategies across datasets of different modalities.

Repository/ SYSTEMDS-3942

Coding agent usage