Hello! I am a graduate student at the Gaoling School of Artificial Intelligence, Renmin University of China, where I am pursuing my combined Master’s and Ph.D. degree under the guidance of Prof. Zhicheng Dou. My anticipated graduation is in 2029.

My primary research interests lie in advancing information retrieval through retrieval-augmented generation (RAG), the application of large language models (LLMs) for next-generation IR, and the development of general-purpose AI agents. I am also deeply interested in how AI can enhance everyday life, particularly through practical and user-friendly products.

Feel free to reach out if you’d like to discuss research collaborations, share ideas, or simply have a conversation about AI and its potential. You can contact me at jinjiajie@ruc.edu.cn.

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Publications

* indicates equal contribution

2025

Decoupled Planning and Execution: A Hierarchical Reasoning Framework for Deep Search
Jiajie Jin, Xiaoxi Li, Guanting Dong, Yuyao Zhang, Yutao Zhu, Yang Zhao, Hongjin Qian, Zhicheng Dou
Preprint, 2025
[Paper] [Code]

Tool-Star: Empowering LLM-Brained Multi-Tool Reasoner via Reinforcement Learning
Guanting Dong, Yifei Chen, Xiaoxi Li, Jiajie Jin, Hongjin Qian, Yutao Zhu, Hangyu Mao, Guorui Zhou, Zhicheng Dou, Ji-Rong Wen
Preprint, 2025 [Paper] [Code]

Hierarchical Document Refinement for Long-Context Retrieval-Augmented Generation
Jiajie Jin, Xiaoxi Li, Guanting Dong, Yuyao Zhang, Yutao Zhu, Yongkang Wu, Zhonghua Li, Qi Ye, Zhicheng Dou
ACL 2025 Main, Oral [Paper] [Code]

Neuro-Symbolic Query Compiler
Yuyao Zhang, Zhicheng Dou, Xiaoxi Li, Jiajie Jin, Yongkang Wu, Zhonghua Li, Qi Ye, Ji-Rong Wen
ACL 2025 Findings
[Paper] [Code]

Retrollm: Empowering Large Language Models to Retrieve Fine-Grained Evidence within Generation
Xiaoxi Li, Jiajie Jin, Yujia Zhou, Yongkang Wu, Zhonghua Li, Qi Ye, Zhicheng Dou
ACL 2025 Main
[Paper]

WebThinker: Empowering Large Reasoning Models with Deep Research Capability
Xiaoxi Li*, Jiajie Jin*, Guanting Dong*, Hongjin Qian, Yutao Zhu, Yongkang Wu, Ji-Rong Wen, Zhicheng Dou
Preprint, 2025
[Paper] [Code] [Huggingface Model]

Search-o1: Agentic Search-Enhanced Large Reasoning Models
Xiaoxi Li, Guanting Dong, Jiajie Jin, Yuyao Zhang, Yujia Zhou, Yutao Zhu, Peitian Zhang, Zhicheng Dou
Preprint, 2025
[Paper] [Code] [Twitter]

Single LLM, Multiple Roles: A Unified Retrieval-Augmented Generation Framework Using Role-Specific Token Optimization
Yutao Zhu, Jiajie Jin, Hongjin Qian, Zheng Liu, Zhicheng Dou, Ji-Rong Wen
Preprint, 2025
[Paper]

FlashRAG: A Modular Toolkit for Efficient Retrieval-Augmented Generation Research
Jiajie Jin, Yutao Zhu, Zhicheng Dou, Guanting Dong, Xinyu Yang, Chenghao Zhang, Tong Zhao, Zhao Yang, Ji-Rong Wen
TheWebConf 2025 Resource, Oral
[Paper] [Code]

From Matching to Generation: A Survey on Generative Information Retrieval
Xiaoxi Li, Jiajie Jin, Yujia Zhou, Yuyao Zhang, Peitian Zhang, Yutao Zhu, Zhicheng Dou
TOIS, 2025
[Paper] [Github]

2024

Trustworthiness in Retrieval-Augmented Generation Systems: A Survey
Yujia Zhou, Yan Liu, Xiaoxi Li, Jiajie Jin, Hongjin Qian, Zheng Liu, Chaozhuo Li, Zhicheng Dou, Tsung-Yi Ho, Philip S Yu
Preprint, 2024
[Paper] [Code]

Metacognitive Retrieval-Augmented Large Language Models
Yujia Zhou, Zheng Liu, Jiajie Jin, Jian-Yun Nie, Zhicheng Dou
TheWebConf 2024 Oral
[Paper] [Code]

Cognitive Personalized Search Integrating Large Language Models with an Efficient Memory Mechanism
Yujia Zhou, Qiannan Zhu, Jiajie Jin, Zhicheng Dou
TheWebConf 2024 Oral
[Paper]

Bider: Bridging Knowledge Inconsistency for Efficient Retrieval-Augmented LLMs via Key Supporting Evidence
Jiajie Jin, Yutao Zhu, Yujia Zhou, Zhicheng Dou
ACL 2024 Findings
[Paper]

2023

Reta-LLM: A Retrieval-Augmented Large Language Model Toolkit
Jiongnan Liu, Jiajie Jin, Zihan Wang, Jiehan Cheng, Zhicheng Dou, Ji-Rong Wen
Preprint, 2023
[Paper] [Code]

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Experience

Ph.D. Student, Gaoling School of Artificial Intelligence, Renmin University of China (RUC)
Advisor: Prof. Zhicheng Dou
Jul. 2025 – Present

M.Sc. Student, Gaoling School of Artificial Intelligence, Renmin University of China (RUC)
Advisor: Prof. Zhicheng Dou
Sep. 2023 – Jul. 2025

B.Eng. in Statistics, School of Mathematical Sciences, University of Science and Technology of China (USTC)
Sep. 2019 – Jul. 2023