Jiongnan Liu (刘炯楠) CS/IR/NLP Ph.D. Candidate Renmin University of China Email: liujn@ruc.edu.cn [Google Scholar] [Semantic Scholar] [DBLP] [GitHub]

About

I am a fifth-year Ph.D. student at the Gaoling School of Artificial Intelligence, Renmin University of China. I am fortunate to be advised by Prof. Zhicheng Dou. Previously, I received B.Eng degrees in Computer Science from School of Information, Renmin University in 2021.

My research focuses on information retrieval and natural language processing, with an emphasis on personalization. Specifically, I work on personalized search in both web and e-commerce domains, as well as personalized content generation. Recently, I have also developed an interest in retrieval-augmented generation.

Experiences

• Alibaba Qwen Team, Intern. June. 2025 - Current, Beijing, China
Direction: Agent.
• Carnegie Mellon University, Visiting student. Oct. 2024 - Apr. 2025, Pittsburgh, USA
Direction: Personalized content generation. Visiting Research Advisor: Chenyan Xiong
• Baidu, Research Intern. Sep. 2023 - Sep. 2024, Beijing, China
Direction: Personalized web search.
• JD.com, Research Intern. Mar. 2022 - Apr. 2023, Beijing, China
Direction: Personalized product search.

Publications & Preprints

• Memory in the Age of AI Agents
  Yuyang Hu, Shichun Liu, Yanwei Yue, Guibin Zhang, Boyang Liu, Fangyi Zhu, Jiahang Lin, Honglin Guo, Shihan Dou, Zhiheng Xi, Senjie Jin, Jiejun Tan, Yanbin Yin, Jiongnan Liu, Zeyu Zhang, Zhongxiang Sun, Yutao Zhu, Hao Sun, Boci Peng, Zhenrong Cheng, Xuanbo Fan, Jiaxin Guo, Xinlei Yu, Zhenhong Zhou, Zewen Hu, Jiahao Huo, Junhao Wang, Yuwei Niu, Yu Wang, Zhenfei Yin, Xiaobin Hu, Yue Liao, Qiankun Li, Kun Wang, Wangchunshu Zhou, Yixin Liu, Dawei Cheng, Qi Zhang, Tao Gui, Shirui Pan, Yan Zhang, Philip Torr, Zhicheng Dou, Ji-Rong Wen, Xuanjing Huang, Yu-Gang Jiang, Shuicheng Yan
  Arxiv 2025. [Paper]

• ORBIT - Open Recommendation Benchmark for Reproducible Research with Hidden Tests
  Jingyuan He, Jiongnan Liu, Vishan Vishesh Oberoi, Bolin Wu, Mahima Jagadeesh Patel, Kangrui Mao, Chuning Shi, I-Ta Lee, Arnold Overwijk, Chenyan Xiong
  NeurIPS 2025 Datasets & Benchmarks track. [Paper]

• LLMs + Persona-Plug = Personalized LLMs
  Jiongnan Liu, Yutao Zhu, Shuting Wang, Xiaochi Wei, Erxue Min, Yu Lu, Shuaiqiang Wang, Dawei Yin, Zhicheng Dou
  ACL 2025 main. [Paper]

• Generate, Not Recommend: Personalized Multimodal Content Generation
  Jiongnan Liu, Zhicheng Dou, Ning Hu, Chenyan Xiong
  Arxiv 2025. [Paper]

• Large language models for information retrieval: A survey
  Yutao Zhu, Huaying Yuan, Shuting Wang, Jiongnan Liu, Wenhan Liu, Chenlong Deng, Haonan Chen, Zhicheng Dou, Ji-Rong Wen
  TOIS 2025. [Paper]

• Enhancing Sequential Personalized Product Search with External Out-of-sequence Knowledge
  Jiongnan Liu, Zhicheng Dou, Jian-Yun Nie, Zhenlin Chen, Guoyu Tang, Sulong Xu, Ji-Rong Wen
  TOIS 2025. [Paper]

• DomainRAG: A Chinese Benchmark for Evaluating Domain-specific Retrieval-Augmented Generation
  Shuting Wang, Jiongnan Liu, Shiren Song, Jiehan Cheng, Yuqi Fu, Peidong Guo, Kun Fang, Yutao Zhu, Zhicheng Dou
  Arxiv 2024. [Paper]

• Generalizing conversational dense retrieval via llm-cognition data augmentation
  Haonan Chen, Zhicheng Dou, Kelong Mao, Jiongnan Liu, Ziliang Zhao
  ACL 2024 main. [Paper]

• Personalized and Diversified: Ranking Search Results in an Integrated Way
  Shuting Wang, Zhicheng Dou, Jiongnan Liu, Qiannan Zhu, Ji-Rong Wen
  TOIS 2024. [Paper]

• Integrated Personalized and Diversified Search Based on Search Logs
  Jiongnan Liu, Zhicheng Dou, Jian-Yun Nie, Ji-Rong Wen
  TKDE 2024. [Paper]

• Contrastive Learning for User Sequence Representation in Personalized Product Search
  Shitong Dai, Jiongnan Liu, Zhicheng Dou, Haonan Wang, Lin Liu, Bo Long, Ji-Rong Wen
  KDD 2023. [Paper]

• RETA-LLM: A retrieval-augmented large language model toolkit
  Jiongnan Liu, Jiajie Jin, Zihan Wang, Jiehan Cheng, Zhicheng Dou, Ji-Rong Wen
  Arxiv 2023. [Paper]

• JDsearch: A Personalized Product Search Dataset with Real Queries and Full Interactions
  Jiongnan Liu, Zhicheng Dou, Guoyu Tang, Sulong Xu
  SIGIR 2023. [Paper]

• A category-aware multi-interest model for personalized product search
  Jiongnan Liu, Zhicheng Dou, Qiannan Zhu, Ji-Rong Wen
  WWW 2022. [Paper]

• DVGAN: A minimax game for search result diversification combining explicit and implicit features
  Jiongnan Liu, Zhicheng Dou, Xiaojie Wang, Shuqi Lu, Ji-Rong Wen
  SIGIR 2020. [Paper]

Academic Services

• Review: SIGIR, CIKM, ACL, TKDE, TOIS, KAIS, ...

Scholarship

• Wu Yuzhang Scholarship (The highest honor in Renmin University of China), 2020
• SenseTime Scholarship, 2020
• Outstanding Graduate of Beijing City, 2021
• China National Scholarship, 2020
• First-class Ph.D. Scholarship of Renmin University of China, 2021,2022,2023
• Outstanding Innovative Talents Cultivation Funds of Renmin University of China, 2022,2023

Awards

• ACM-ICPC Asia Regional Contest Silver Medal, 2017,2018,2019
• ICPC Asia-East Continent Final Silver Medal, 2018
• Bronze Medal, Chinese National Olympiad in Informatics, 2016