Jiazi Bu 卜家梓

   PhD (MMLab @ NTU & SJTU), BEng (SJTU)

I am a first-year joint Ph.D. candidate at Nanyang Technological University and Shanghai Jiao Tong University, co-supervised by Prof. Dahua Lin and Prof. Xingang Pan. Prior to that, I received the B.Eng. degree with honors in Artificial Intelligence (the first session of GuoZhi Class Programme, held by Prof. Xiaoou Tang and Prof. Cewu Lu), Shanghai Jiao Tong University. Moreover, I have also worked with Prof. Junchi Yan at SJTU-ReThinkLab.

My current research focuses on (but NOT limited to) 2D AIGC and VLM. Prior to that, I worked on Computer Vision and AI4Science.

Please feel free to send me E-mail for potential collaborations.

E-mail: bujiazi001@sjtu.edu.cn  /  CV (26.04)  /  Scholar  /  GitHub

profile photo
🔥 News

2026-04: I accept the offer of Joint Ph.D. Degree Programme at Nanyang Technological University (NTU).

2026-03: 1 paper, Uni-Classifier, is accepted by ICME 2026 (as Co-First Author).

2026-02: 1 paper, Granular-GRPO, is accepted by CVPR 2026 (as Co-First Author).

2026-01: 1 paper, DiCache, is accepted by ICLR 2026 (as First Author).

2025-09: 1 paper, HiFlow, is accepted by NeurIPS 2025 (as First Author).

2025-09: I transition directly into the CS Ph.D. Programme at SJTU, advised by Prof. Dahua Lin.

2025-06: My Bachelor's Thesis is awarded the Best Bachelor's Thesis of SJTU.

2025-06: I receive an additional Zhiyuan Honor Bachelor's Degree from SJTU.

2025-06: I receive my B.Eng. Degree from SJTU (as one of TOP 30 Outstanding Graduates).

2025-06: 1 paper, Light-A-Video, is accepted by ICCV 2025 (as Co-First Author).

2025-02: 1 paper, ByTheWay, is accepted by CVPR 2025 (as First Author).

2025-01: 1 paper, MotionClone, is accepted by ICLR 2025 (as Co-First Author).

2025-01: 1 paper, HierDDI, is accepted by SCIENCE CHINA Information Sciences.

2024-09: 1 paper, Unveiling The Matthew Effect Across Channels, is accepted by NeurIPS 2024.

2023-11: I begin the internship at Shanghai AI Laboratory, working with Dr. Jiaqi Wang.

2023-11: 1 paper, ViTree, is accepted by AAAI 2024.

2023-11: I receive National First Prize & First Prize in Shanghai Chapter in CUMCM 2023.

2022-11: I become a member of SJTU-RethinkLab, advised by Prof. Junchi Yan.

2021-12: I am enrolled in the GuoZhi Class Programme of SJTU.

2021-09: I am enrolled in the Zhiyuan Honors Programme of SJTU.

2021-08: I enter Shanghai Jiao Tong University (SJTU) as an undergraduate, major in AI.

🥇 (Co-) First Author Publications
dicache
DiCache: Let Diffusion Model Determine Its Own Cache
Jiazi Bu*, Pengyang Ling*, Yujie Zhou*, Yibin Wang, Yuhang Zang, Dahua Lin, Jiaqi Wang
ICLR 2026
Page / Paper / Code
hiflow
HiFlow: Training-free High-Resolution Image Generation with Flow-Aligned Guidance
Jiazi Bu*, Pengyang Ling*, Yujie Zhou*, Pan Zhang, Tong Wu, Xiaoyi Dong, Yuhang Zang, Yuhang Cao, Dahua Lin, Jiaqi Wang
NeurIPS 2025
Page / Paper / Code
bytheway
ByTheWay: Boost Your Text-to-Video Generation Model to Higher Quality in a Training-free Way
Jiazi Bu*, Pengyang Ling*, Pan Zhang, Tong Wu, Xiaoyi Dong, Yuhang Zang, Yuhang Cao, Dahua Lin, Jiaqi Wang
CVPR 2025
Page / Paper / Code
mvgrpo
From Sparse to Dense: Multi-View GRPO for Flow Models via Augmented Condition Space
Jiazi Bu*, Pengyang Ling*, Yujie Zhou*, Yibin Wang, Yuhang Zang, Tianyi Wei, Xiaohang Zhan, Jiaqi Wang, Tong Wu, Xingang Pan, Dahua Lin
arXiv 2026
Page / Paper / Code (Coming Soon)
motionclone
MotionClone: Training-Free Motion Cloning for Controllable Video Generation
Pengyang Ling*, Jiazi Bu*, Pan Zhang, Xiaoyi Dong, Yuhang Zang, Tong Wu, Huaian Chen, Jiaqi Wang, Yi Jin
ICLR 2025
Page / Paper / Code
light-a-video
Light-A-Video: Training-free Video Relighting via Progressive Light Fusion
Yujie Zhou*, Jiazi Bu*, Pengyang Ling*, Pan Zhang, Tong Wu, Qidong Huang, Jinsong Li, Xiaoyi Dong, Yuhang Zang, Yuhang Cao, Anyi Rao, Jiaqi Wang, Li Niu
ICCV 2025
Page / Paper / Code
g2rpo
Fine-Grained GRPO for Precise Preference Alignment in Flow Models
Yujie Zhou*, Pengyang Ling*, Jiazi Bu*, Yibin Wang, Yuhang Zang, Jiaqi Wang, Li Niu, Guangtao Zhai
CVPR 2026
Page / Paper / Code
uni-c
Uni-Classifier: Leveraging Video Diffusion Priors for Universal Guidance Classifier
Yujie Zhou*, Pengyang Ling*, Jiazi Bu*, Bingjie Gao, Li Niu
ICME 2026
Paper / Code (Coming Soon)
🥈 Co-Author Publications
unigenbench++
Unified Personalized Reward Model for Vision Generation
Yibin Wang, Yuhang Zang, Feng Han, Jiazi Bu, Yujie Zhou, Cheng Jin, Jiaqi Wang
arXiv 2026
Page / Paper / Code
unigenbench++
UniGenBench++: A Unified Semantic Evaluation Benchmark for Text-to-Image Generation
Yibin Wang*, Zhimin Li*, Yuhang Zang*, Jiazi Bu, Yujie Zhou, Chunyu Wang, Qinglin Lu, Cheng Jin, Jiaqi Wang
arXiv 2025
Page / Paper / Code
pref-grpo
Pref-GRPO: Pairwise Preference Reward-based GRPO for Stable Text-to-Image Reinforcement Learning
Yibin Wang*, Zhimin Li*, Yuhang Zang*, Yujie Zhou, Jiazi Bu, Chunyu Wang, Qinglin Lu, Cheng Jin, Jiaqi Wang
arXiv 2025
Page / Paper / Code
endocot
EndoCoT: Scaling Endogenous Chain-of-Thought Reasoning in Diffusion Models
Xuanlang Dai, Yujie Zhou, Long Xing, Jiazi Bu, Xilin Wei, Yuhong Liu, Beichen Zhang, Kai Chen, Yuhang Zang
arXiv 2026
Page / Paper / Code
hierddi
Drug-drug Interaction Prediction via Hierarchical Structure Modeling
Huaijin Wu, Jiazi Bu, Nianzu Yang, Yao Sun, Haitao Song, Ning Liu, Junchi Yan
SCIENCE CHINA Information Sciences
Paper / Code
🥉 Technical Reports
metascript
MetaScript: Few-Shot Handwritten Chinese Content Generation via Generative Adversarial Networks
Jiazi Bu*, Qirui Li*, Kailing Wang*, Xiangyuan Xue*, Zhiyuan Zhang*
arXiv 2023, Project of AI3604 Computer Vision, 2023 Fall, SJTU
Report / Code
🏆 Honors and Awards
  • 2025: Ye Jun and Shen Nanpeng Outstanding Scholarship ¥20000 (Top 30 Graduates)
  • 2022: Guozhi Scholarship ¥8000
  • 2021~2024: Zhiyuan Scholarship ¥5000 × 4
  • 2022~2025: SJTU Undergraduate Scholarship × 4
  • 2023: CUMCM National First Prize (Top 0.55%) & First Prize in Shanghai Chapter
  • 2025: SJTU Zhiyuan Honor Bachelor's Degree
  • 2023: SJTU President Award
  • 2021: SJTU Outstanding Freshman Training Camp Member
  • 2025: SJTU Outstanding Graduate
  • 2025: SJTU Outstanding Bachelor's Thesis of School of Computer Science
  • 2025: SJTU Best Bachelor's Thesis Award (Top 1%)
🖥️ Selected Services

Academic Reviewer:

  • Conference Reviewer: ECCV (2026), CVPR (2026), ICLR (2026).
  • Journal Reviewer: T-PAMI, TMLR.

Teaching Assistant:

  • TBD

Volunteer:

  • Student volunteer (for 55 hours) during the COVID-19 pandemic.
  • Student volunteer for CUMCM 2024.