Haoji Zhang (张颢继)

I am a second-year master's student at Shenzhen International Graduate School, Tsinghua University, majoring in Data Science and Information Technology. I expect to graduate in 2027. I am fortunate to be supervised by Prof. Yansong Tang in IVG@SZ group.

My research focuses on building efficient and powerful MLLMs, including:

  • Efficient Long Video Understanding: AR, VQA, VTG, STVG
  • Large-scale MLLM Training: PE, PT, SFT, Post-Train (GRPO, Tool-RL)
  • Agentic Model and Multimodal Reasoning
  • Unified Understanding and Generation Model

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News
  • 2026.02: Thinking With Videos is accepted by CVPR'26
  • 2026.01: We introduce Vidi2.5, the open-source SOTA MLLM for long video TR, STG, VQA and plot reasoning
  • 2025.11: We introduce STVG-o1, enabling chain-of-bboxes reasoning for spatial-temporal video grounding
  • 2025.05: Flash-VStream is accepted by ICCV'25
  • 2025.05: Ponder & Press is accepted by ACL'25
  • 2024.12: Uni-AdaFocus is accepted by TPAMI
Education
  • Tsinghua University, Shenzhen International Graduate School 2024 – 2027
    M.S. in Data Science and Information Technology
    Advisor: Prof. Yansong Tang · IVG@SZ Group
  • Tsinghua University 2020 – 2024
    B.S. in Mathematics and Physics
    Beijing Outstanding Bachelor's Graduate (Top 5%)
Research Internships
Publications and Preprints [ Full List ]
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(* Equal Contribution, † Corresponding Author)
Honors and Awards
  • First-Class Outstanding Student Scholarship, Tsinghua University, 2025. (清华大学校级一等综合优秀奖学金)
  • Beijing Outstanding Bachelor's Graduate, 2024. (北京市优秀毕业生, Top 5% in Tsinghua University)
  • First-Class Outstanding Student Scholarship, Tsinghua University, 2023. (清华大学校级一等综合优秀奖学金)
  • First-Class Outstanding Student Scholarship, Tsinghua University, 2022. (清华大学校级一等综合优秀奖学金)
  • First-Class Outstanding Student Scholarship, Tsinghua University, 2021. (清华大学校级一等综合优秀奖学金)
  • THUWC2019 Gold Medal, 2019. (清华大学全国信息学冬令营金牌)
  • NOIWC2019 Silver Medal, 2019. (第36届全国信息学奥林匹克冬令营银牌)
  • NOI2019 Bronze Medal, 2019. (第36届全国信息学奥林匹克竞赛铜牌)
Academic Services
  • Conference Reviewer: ICCV, AAAI, ICLR, CVPR
  • Journal Reviewer: JVCIR
Contact
  • Email: hodge013140 [AT] gmail [DOT] com
  • WeChat: the same as email

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© Haoji Zhang | Last updated: Apr 21, 2026