I’m Jiashuo Zhang (张家硕). I am currently an algorithm expert at Skyward Lab @ Ant Group (Ant Star Program). My work focuses on post-training and LLM4Security. I lead efforts on training LLMs, including Ling and other models, to improve their cyber security capabilities. Before joining Ant Group, I received my Ph.D. in Computer Science from Peking University under the supervision of Prof. Zhong Chen, and obtained my Bachelor’s degree from the School of Computer Science at Peking University.

Research Interns: We are looking for highly motivated research interns interested in Post-Training and LLM4Security. Please feel free to email me your CV.

🔥 News

[2026-06]🔥 I received my Ph.D. degree from Peking University. Grateful to my advisor, collaborators, and friends for their support!
[2026-05]🔥 I was selected as an Outstanding Graduate of Peking University. Thanks for the recognition!
[2026-04]🔥We released , a LEGO-style project that reconstructs Claude Code in Python. Welcome to contribute!
[2026-03]🔥 Our paper titled “Detecting Code-Comment Inconsistencies in Smart Contracts by Combining LLM and Program Analysis” has been accepted by FSE’26!
[2026-01]🔥 Our paper titled “Lost in Blockchain Address Misuse: Hidden Cross-Platform Risks and Their Security Impact” has been accepted by Security’26!
[2025-12]🔥 I am honored to be selected for top talent programs, including Ant Star Program, Tencent Qingyun Talent Program, ByteDance Soaring Star Talent Program, and JD TGT Talent Program. Thanks for the recognition!
[2025-11]🔥 Our paper titled “Validity Is Not Enough: Uncovering the Security Pitfall in Chainlink’s Off-Chain Reporting Protocol” has been accepted by NDSS’26!
[2025-09]🔥 Our paper titled “Demystifying Toxic Content on Ethereum” receives Distinguished Paper Award at BWTAC 2025. Thanks for the recognition!
[2025-06]🔥 Our paper titled “FORGE: An LLM-driven Framework for Large-Scale Smart Contract Vulnerability Dataset Construction” has been accepted by ICSE’26!
[2025-05]🔥 I won the Presidential Scholarship of Peking University (highest honor for Ph.D. students at PKU). Thanks for the recognition!
[2025-05]🔥 Invited to serve as a program committee member of APSEC 2025!
[2025-04]🔥 Our paper titled “Demystifying and Detecting Cryptographic Defects in Ethereum Smart Contracts” receives ACM SIGSOFT Distinguished Paper Award at ICSE 2025. Thanks for the recognition!
[2025-03]🔥 Our paper titled “When Crypto Fails: Demystifying Cryptographic Defects in Ethereum Smart Contracts” has been accepted by TSE!
[2025-01]🔥Invited to serve as a program committee member (artifact evaluation) of ASPLOS 2025!
[2024-11]🔥Our paper titled “Automated Test Generation For Smart Contracts via On-Chain Test Case Augmentation and Migration” has been accepted by ICSE’25!

🎓 Education

Peking University, Ph.D. in Computer Science (Advisor: Prof. Zhong Chen) 2021 – 2026
Peking University, Bachelor in Computer Science, School of Computer Science (Advisor: Prof. Zhong Chen) 2017 – 2021

🎯 Research Interests

My research interests include:

Post-training
LLM4Security

📃 Recent Publications (Full List)

Detecting Code-Comment Inconsistencies in Smart Contracts by Combining LLM and Program Analysis.
Jiashuo Zhang, Jiachi Chen, Ting Zhang, Yue Li, Daoyuan Wu, Yanlin Wang, Jianbo Gao, Ting Chen, Zhong Chen.
The 2026 ACM International Conference on the Foundations of Software Engineering (FSE’26), CCF-A, Full Paper, 2026.
Validity Is Not Enough: Uncovering the Security Pitfall in Chainlink’s Off-Chain Reporting Protocol.
Di Zhai, Jiashuo Zhang*, Jianbo Gao*, Tianhao Liu, Tao Zhang, Jian Wang and Jiqiang Liu.*
The 2026 Network and Distributed System Security Symposium (NDSS’26), CCF-A, Full Paper, 2026.
Lost in Blockchain Address Misuse: Hidden Cross-Platform Risks and Their Security Impact.
Zhenzhe Shao, Jiashuo Zhang, Zihao Li, Daoyuan Wu, Chong Chen, Yiming Shen, Lingfeng Bao, Yanlin Wang, Jiachi Chen.
The 2026 USENIX Security Symposium (Security’26), CCF-A, Full Paper, 2026.
FORGE: An LLM-driven Framework for Large-Scale Smart Contract Vulnerability Dataset Construction.
Jiachi Chen, Yiming Shen, Jiashuo Zhang*, Zihao Li, John Grundy, Zhenzhe Shao, Yanlin Wang, Jiashui Wang, Ting Chen* and Zibin Zheng.
The 48th International Conference on Software Engineering (ICSE’26), CCF-A, Full Paper, 2026.
Towards Secure Oracle Usage: Understanding and Detecting Oracle Vulnerabilities in Smart Contracts.
Ziming Chen, Yue Li, Jiashuo Zhang, Jianbo Gao, Che Wang, Jiakun Hao, Anming Xie, Zhi Guan and Zhong Chen.
The 33rd IEEE International Conference on Software Analysis, Evolution and Reengineering (SANER’26), CCF-B, Full Paper, 2026.
When Crypto Fails: Demystifying Cryptographic Defects in Ethereum Smart Contracts.
Jiashuo Zhang, Yiming Shen, Jiachi Chen, Tao Zhang, Yanlin Wang, Ting Chen, Jianbo Gao and Zhong Chen.
IEEE Transactions on Software Engineering (TSE’25), CCF-A, Full Paper, 2025.
Automated Test Generation For Smart Contracts via On-Chain Test Case Augmentation and Migration.
Jiashuo Zhang, Jiachi Chen, John Grundy, Jianbo Gao, Yanlin Wang, Ting Chen, Zhi Guan and Zhong Chen.
The 47th International Conference on Software Engineering (ICSE’25), CCF-A, Full Paper, 2025.
Demystifying and Detecting Cryptographic Defects in Ethereum Smart Contracts.
Jiashuo Zhang, Yiming Shen, Jiachi Chen, Jianzhong Su, Yanlin Wang, Ting Chen, Jianbo Gao and Zhong Chen.
The 47th International Conference on Software Engineering (ICSE’25), CCF-A, Full Paper, 2025.
🏆 ACM SIGSOFT Distinguished Paper Award
When Contracts Meets Crypto: Exploring Developers’ Struggles with Ethereum Cryptographic APIs.
Jiashuo Zhang, Jiachi Chen, Zhiyuan Wan, Ting Chen, Jianbo Gao and Zhong Chen.
The 46th International Conference on Software Engineering (ICSE’24), CCF-A, Full Paper, 2024.

🏆 Honors and Awards

Outstanding Graduate of Peking University, 2026
Selected for Ant Star Program, Tencent Qingyun Talent Program, ByteDance Soaring Star Talent Program, and JD TGT Talent Program, 2025
ACM SIGSOFT Distinguished Paper Award (ICSE, CCF-A) 2025
Presidential Scholarship of Peking University (highest honor for Ph.D. students at PKU), 2025
Merit Student, Peking University, 2025
BWTAC Distinguished Paper Award, 2025
Tencent Scholarship, School of Computer Science, Peking University, 2025
ACM SIGSOFT CAPS Travel Award, ICSE’25, 2025
The Peking University Challenge Cup First-Class Award, Peking University, 2025
Peking University First-class Scholarship, Peking University, 2024
Merit Student, Peking University, 2024
ACM SIGSOFT CAPS Travel Award, ICSE’24, 2024
Ubiquant Scholarship, Peking University, 2023
Merit Student, Peking University, 2023
Graduate Research Travel Award, Peking University, ICSE’23, 2023
Yang Fuqing & Wang Yangyuan Academician Scholarship, Peking University, 2022
Merit Student, Peking University, 2022
Merit Student, Peking University, 2020
The Third Prize of Peking University Scholarship, Peking University, 2020

🏫 Teaching Experience

Introduction to Information Security (Undergraduate), TA, Fall 2022, Peking University
Data Structures and Algorithms (Undergraduate), TA, Spring 2022, Peking University
Introduction to Information Security (Undergraduate), TA, Fall 2021, Peking University

💼 Service

Journal

Reviewer of IEEE Transactions on Dependable and Secure Computing (TDSC)
Reviewer of IEEE Transactions on Networking (ToN)
Reviewer of Automated Software Engineering (AuSE)
Reviewer of Expert Systems with Applications (ESWA)
Reviewer of Blockchain: Research and Applications (BCRA)
Reviewer of Chinese Journal of Electronics (CJE)

Conference

PC Member, APSEC 2026 (ERA Track)
PC Member - Artifact Evaluation, ASPLOS 2025
PC Member - Junior PC, MSR 2025
PC Member, APSEC 2025
Sub-reviewer: ICSE, FSE, SANER, AuSE, SEKE