CV — Jiajun Fan

🎓 Education

University of Illinois Urbana-Champaign

Ph.D. in Computer Science GPA 4.0/4.0

📍 Urbana, IL, USAAug 2024 – May 2029 (expected)

Research: Autonomous RL post-training for flow/diffusion models & multimodal reasoning LLMs
Service: Reviewer @ ICML 2025–26, ICLR 2025–26, NeurIPS 2024–25, CVPR 2026

Tsinghua University

M.Eng. in Computer Technology GPA 3.97/4.0 · Top 1.3%

📍 Beijing, ChinaSept 2021 – Jun 2024

Service: Reviewer @ NeurIPS 2022–23, ICML 2023–24, ICLR 2024

Nankai University

B.Eng. in Intelligent Science and Technology Rank 1/83

📍 Tianjin, ChinaSept 2017 – Jun 2021

GPA 93.28/100 (3.9/4.0) · National Scholarship ×2 (Top 1%)

📄 Selected Publications * = first / co-first author

ICLR
2026

Incentivizing Consistent, Effective and Scalable Reasoning Capability in Audio LLMs via Reasoning Process Rewards

J. Fan*, R. Ren, J. Li, R. Pandey, P.G. Shivakumar, Y. Gu, A. Gandhe, G. Liu, I. Bulyko

🏆 SOTA MMAU · Outperforms Gemini 2.5 Pro & GPT-4o Audio

ICLR
2026

SP-VLA: A Joint Model Scheduling and Token Pruning Approach for VLA Model Acceleration

Y. Li, Y. Meng, Z. Sun, K. Ji, C. Tang, J. Fan, X. Ma, S.-T. Xia, Z. Wang, W. Zhu

⚡ 1.5× lossless speedup (LIBERO) · 2.4× (SimplerEnv)

NeurIPS
2025

Adaptive Divergence Regularized Policy Optimization for Fine-tuning Generative Models

J. Fan*, T. Wei, C. Cheng, Y. Chen, G. Liu

🚀 2B SD3 surpasses 4.8B & 12B models

NeurIPS
2025

Variational Supervised Contrastive Learning

Z. Wang, J. Fan, T. Nguyen, H. Ji, G. Liu

📊 SOTA 79.36% Top-1 on ImageNet-1K (ResNet-50)

ICLR
2025

Online Reward-Weighted Fine-Tuning of Flow Matching with Wasserstein Regularization

J. Fan*, S. Shen, C. Cheng, Y. Chen, C. Liang, G. Liu

✨ First online RLHF for flow matching models

Preprint
2025

Fine-tuning Flow Matching Generative Models with Intermediate Feedback

J. Fan*, C. Cheng, S. Shen, X. Zhou, G. Liu · Under Review

TPAMI
2025

PRANCE: Joint Token-Optimization and Structural Channel-Pruning for Adaptive ViT Inference

Y. Li, C. Tang, Y. Meng, J. Fan, Z. Chai, X. Ma, Z. Wang, W. Zhu

ICLR 2023
Oral ★

Learnable Behavior Control: Breaking Atari Human World Records via Sample-Efficient Behavior Selection

J. Fan*, Y. Zhuang, Y. Liu, J. Hao, B. Wang, J. Zhu, H. Wang, S.-T. Xia

🏅 Ranked 5/4176 · 24 Atari world records · 500× data efficiency

ICML
2022

Generalized Data Distribution Iteration

J. Fan*, C. Xiao

📈 Beats Agent57 with 500× less data · 22 world records

🏅 Awards & Honors

2024GPA 4.0/4.0, UIUC Ph.D. Program
2024GPA 3.97/4.0, Top 1.3% — Tsinghua University M.Eng.
2021Outstanding Graduates (Top 1%) — Nankai UniversityTop 1%
2021Excellent Graduation Thesis — Nankai University
2021Tang Lixin ScholarshipTop 1%
2020National Scholarship (Rank 1/83)Top 1%
2020Nomination for Zhou Enlai Scholarship
2019National Scholarship (Rank 1/83)Top 1%
20193rd Prize, RoboCup@HOME Education World Final — Sydney, Australia
2019Bronze Medal, ACM/ICPC Asia Regional — Xuzhou
2018National 2nd Prize, Mathematical Contest in ModelingTop 5%