I am a fourth-year Ph.D. student @ Computer Science at Shanghai Jiao Tong University (SJTU). I am with the X-LANCE Lab, supervised by Professor Kai Yu and Associate Professor Lu Chen. I am currently a research intern at Shanghai AI Laboratory. Previously, I received my B.Sc. degree in Computer Science and Technology from Nanjing University (NJU) in 2022.
My research interests lie in large language model reasoning and agentic reinforcement learning, with a particular focus on GUI agents and autonomous AI scientists. My long-term goal is to build agents that can reason, learn from environmental feedback, and reliably solve complex real-world and scientific problems.
* Equal contribution
ACM MM 2026
We equip multimodal LLMs with image cropping and code-based computation, then train tool use through agentic reinforcement learning on DuoChart. This improves fine-grained visual grounding and numerical reasoning across chart benchmarks.
arXiv 2025
We train a chemical reasoning LLM with reinforcement learning and chemically verifiable rewards for retrosynthesis prediction. Its explicit reasoning improves both accuracy and interpretability, reaching 65.0% top-1 accuracy on USPTO-50K.
arXiv 2025
We provide dense, step-level progress rewards for training GUI agents instead of scoring only final outcomes. An LCS-based self-annotation method identifies key trajectory steps and supplies progress labels without costly manual annotation.
IEEE/ACM TASLP
We dynamically adjust speculative draft length through lightweight blockwise pre-verification, stopping low-quality drafts before target-model verification. Pacer consistently improves standard speculative decoding and achieves up to 2.66× speedup over autoregressive decoding.
Danyang Zhang, Lu Chen, Situo Zhang, Hongshen Xu, Zihan Zhao, Kai Yu.
Da Ma, Lu Chen, Situo Zhang, Yuxun Miao, Su Zhu, Zhi Chen, Hongshen Xu, Hanqi Li, Shuai Fan, Lei Pan, Kai Yu.
Zihan Zhao, Bo Chen, Ziping Wan, Lu Chen, Xuanze Lin, Shiyang Yu, Situo Zhang, Da Ma, Zichen Zhu, Danyang Zhang, Huayang Wang, Zhongyang Dai, Liyang Wen, Xin Chen, Kai Yu.
Bohan Li, Hankun Wang, Situo Zhang, Yiwei Guo, Kai Yu.
Hongshen Xu, Zichen Zhu, Situo Zhang, Da Ma, Shuai Fan, Lu Chen, Kai Yu.
Zichen Zhu, Hao Tang, Yansi Li, Dingye Liu, Hongshen Xu, Kunyao Lan, Danyang Zhang, Yixuan Jiang, Hao Zhou, Chenrun Wang, Situo Zhang, Liangtai Sun, Yixiao Wang, Yuheng Sun, Lu Chen, Kai Yu.
Zichen Zhu*, Yuheng Sun*, Mingxuan Zhu*, Wenjie Ma, Situo Zhang, Zhexiang Wang, Ziyue Yang, Danyang Zhang, Kunyao Lan, Zihan Zhao, Dingye Liu, Siqi Xiang, Lu Chen, Kai Yu.
Zixu Yang*, Hang Zheng*, Nan Jiang, Zhiyang Tang, Situo Zhang, Xiaobao Wu, Lu Chen, Kai Yu.
Situo Zhang, Hankun Wang, Da Ma, Zichen Zhu, Lu Chen, Kunyao Lan, Kai Yu.
Zichen Zhu, Yang Xu, Lu Chen, Jingkai Yang, Yichuan Ma, Yiming Sun, Hailin Wen, Jiaqi Liu, Jinyu Cai, Yingzi Ma, Situo Zhang, Zihan Zhao, Liangtai Sun, Kai Yu.
Danyang Zhang, Zhennan Shen, Rui Xie, Situo Zhang, Tianbao Xie, Zihan Zhao, Siyuan Chen, Lu Chen, Hongshen Xu, Ruisheng Cao, Kai Yu.
Lu Chen, Situo Zhang, Kai Yu.
I collaborate closely with Danyang Zhang, Ruisheng Cao @ Qwen, Alibaba, Zihan Zhao, Zichen Zhu, Hongshen Xu @ MiMo, Xiaomi, Da Ma, Yifan Zhang, Xuanze Lin, and Hanqi Li. I welcome opportunities for discussions and potential collaborations. Please feel free to contact me via email.
Teaching Assistant, Natural Language Processing, Fall 2023
Teaching Assistant, Discrete Mathematics, Spring 2024
I enjoy photography—collecting places, light, and moments along the way.