Junhao Chen



I am a first-year PhD student at XLANG Lab, HKU, supervised by Prof. Tao Yu. I received my B.Eng. in Computer Science from Tsinghua University in June 2026. During my undergraduate years, I had the privilege of being mentored by Professors Zhiyuan Liu and Yulia Tsvetkov. I am currently engaged in VLA research.

My research interests lie in VLA (mostly simulation—robots are expensive and I am not :-D), multimodal learning, and RL.

Outside of academics, I enjoy playing basketball, jogging, and engaging in board games.

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Qwen-VLA: Unifying Vision-Language-Action Modeling across Tasks, Environments, and Robot Embodiments
Qiuyue Wang, Mingsheng Li, Jian Guan, Jinhui Ye, Sicheng Xie, Yitao Liu, Junhao Chen, et al.
Preprint, 2026
arXiv / GitHub

FineVLA: Fine-Grained Instruction Alignment for Steerable Vision-Language-Action Policies
Xintong Hu, Xuhong Huang, Jinyu Zhang, Yutong Yao, Yuchong Sun, Qiuyue Wang, Mingsheng Li, Sicheng Xie, Yitao Liu, Junhao Chen, Yixuan Chen, Yingming Zheng, Shuai Bai, Tao Yu
Preprint, 2026
arXiv / GitHub

MADFormer: Mixed Autoregressive and Diffusion Transformers for Continuous Image Generation
Junhao Chen, Yulia Tsvetkov, Xiaochuang Han
ICLR, 2026
arXiv / GitHub

States Hidden in Hidden States: Implicit Discrete State Representations Emerge in LLMs' Hidden States
Junhao Chen, Shengding Hu, Zhiyuan Liu*, Maosong Sun*
Preprint
arXiv / GitHub

InfiniteBench: Extending Long Context Evaluation Beyond 100K Tokens
Xinrong Zhang, Yingfa Chen, Shengding Hu, Zihang Xu, Junhao Chen, Moo Khai Hao, Xu Han, Zhen Leng Thai, Shuo Wang, Zhiyuan Liu*, Maosong Sun*
ACL, 2024
arXiv / GitHub

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