Chongming GAO | 高崇铭

Postdoc @ University of Science and Technology of China (USTC)

Mentor: Xiangnan He (何向南).

Research Interest: Recommender Systems, Data Mining

619082231
chongming.gao@gmail.com

Hefei, China

I am currently a Postdoctoral Researcher at the University of Science and Technology of China (USTC), where I also completed my Ph.D. under the guidance of Prof. Xiangnan HE (何向南). My expertise lies in information retrieval and recommender systems. I hold both M.Eng. and B.Eng. degrees from the University of Electronic Science and Technology of China (UESTC), supervised by Prof. Junming SHAO (邵俊明). I have also interned at leading tech companies such as Kuaishou, Alibaba DAMO Academy, and Alibaba Group’s AI Labs, focusing on conversational recommender systems and AI applications in social science.

Selected Research

pdf	DLCRec: A Novel Approach for Managing Diversity in LLM-Based Recommender Systems Jiaju Chen, Chongming Gao, Shuai Yuan, Shuchang Liu, Qingpeng Cai, Peng Jiang WSDM 2025 Code Corresponding Author

pdf	How Do Recommendation Models Amplify Popularity Bias? An Analysis from the Spectral Perspective Siyi Lin, Chongming Gao, Jiawei Chen, Sheng Zhou, Binbin Hu, Yan Feng, Chun Chen, Can Wang WSDM 2025

pdf	EasyRL4Rec: An Easy-to-use Library for Reinforcement Learning Based Recommender Systems Yuanqing Yu, Chongming Gao, Jiawei Chen, Heng Tang, Yuefeng Sun, Qian Chen, Weizhi Ma, Min Zhang SIGIR 2024 Code 知乎 Corresponding Author

pdf	Reformulating Conversational Recommender Systems as Tri-Phase Offline Policy Learning Gangyi Zhang, Chongming Gao, Hang Pan, Runzhe Teng, Ruizhe Li CIKM 2024 Corresponding Author

pdf	Dual-Phase Accelerated Prompt Optimization Muchen Yang, Moxin Li, Yongle Li, Zijun Chen, Chongming Gao, Junqi Zhang, Yangyang Li, Fuli Feng EMNLP 2024 Findings Corresponding Author

pdf	Large Language Models are Learnable Planners for Long-Term Recommendation Wentao Shi, Xiangnan He, Yang Zhang, Chongming Gao, Xinyue Li, Jizhi Zhang, Qifan Wang, Fuli Feng SIGIR 2024 Code 知乎

pdf	Leave No Patient Behind: Enhancing Medication Recommendation for Rare Disease Patients Zihao Zhao, Yi Jing, Fuli Feng, Jiancan Wu, Chongming Gao, Xiangnan He SIGIR 2024

pdf	Auctionformer: A Unified Deep Learning Algorithm for Solving Equilibrium Strategies in Auction Games Kexin Huang, Ziqian Chen, Xue Wang, Chongming Gao, Jinyang Gao, Bolin Ding, Xiang Wang ICML 2024

pdf	Treatment Effect Estimation for User Interest Exploration on Recommender Systems Jiaju Chen, Wenjie Wang, Chongming Gao, Peng Wu, Jianxiong Wei, Qingsong Hua SIGIR 2024

pdf	Leave No Patient Behind: Enhancing Medication Recommendation for Rare Disease Patients Zihao Zhao, Yi Jing, Fuli Feng, Jiancan Wu, Chongming Gao, Xiangnan He SIGIR 2024

pdf	Vague Preference Policy Learning for Conversational Recommendation Gangyi Zhang, Chongming Gao, Wenqiang Lei, Xiaojie Guo, Shijun Li, Hongshen Chen, Zhuozhi Ding, Sulong Xu, Lingfei Wu Preprint 2024 Corresponding Author

pdf	Alleviating Matthew Effect of Offline Reinforcement Learning in Interactive Recommendation Chongming Gao, Kexin Huang, Jiawei Chen, Yuan Zhang, Biao Li, Peng Jiang, Shiqi Wang, Zhong Zhang, Xiangnan He SIGIR 2023 Slides Code 知乎 Best Paper Honorable Mention

pdf	CIRS: Bursting Filter Bubbles by Counterfactual Interactive Recommender System Chongming Gao, Wenqiang Lei, Jiawei Chen, Shiqi Wang, Xiangnan He, Shijun Li, Biao Li, Yuan Zhang, Peng Jiang TOIS 2023 Slides Code 知乎

pdf	On the Theories Behind Hard Negative Sampling for Recommendation Wentao Shi, Jiawei Chen, Fuli Feng, Jizhi Zhang, Junkang Wu, Chongming Gao, Xiangnan He WWW 2023 Slides Code

pdf	RecAD: Towards A Unified Library for Recommender Attack and Defense Changsheng Wang, Jianbai Ye, Wenjie Wang, Chongming Gao, Fuli Feng, Xiangnan He RecSys 2023 Code

pdf	KuaiRand: An Unbiased Sequential Recommendation Dataset with Randomly Exposed Videos Chongming Gao, Shijun Li, Yuan Zhang, Jiawei Chen, Biao Li, Xiangnan He, Wenqiang Lei, Peng Jiang CIKM 2022 Webpage 知乎

pdf	KuaiRec: A Fully-observed Dataset and Insights for Evaluating Recommender Systems Chongming Gao, Shijun Li, Wenqiang Lei, Biao Li, Peng Jiang, Jiawei Chen, Xiangnan He, Jiaxin Mao, Tat-Seng Chua CIKM 2022 Webpage 知乎 Statistics Demo

pdf	Advances and Challenges in Conversational Recommender Systems: A Survey Chongming Gao, Wenqiang Lei, Xiangnan He, Maarten de Rijke, Tat-Seng Chua Open 2021 Slides Survey

pdf	Revisiting Representation Degeneration Problem in Language Modeling Zhong Zhang, Chongming Gao, Cong Xu, Rui Miao, Qinli Yang, Junming Shao EMNLP 2020

pdf	Towards Robust Arbitrarily Oriented Subspace Clustering Zhong Zhang, Chongming Gao, Chongzhi Liu, Qinli Yang, Junming Shao DASFAA 2019 Best Paper

Awards & Honors

2023	One of our papers won the Best Paper Honorable Mention Award of SIGIR 2023 (CCF A).
2019	One of our papers won the Best Paper Award of DASFAA 2019 (CORE2018 Rank B, CCF B).
2019	Outstanding Master's Thesis Award of UESTC.
2019	Outstanding Graduate Student Award of UESTC.
2016	Rank No.1 in Undergraduate Thesis Defense of UESTC. Outstanding undergraduate graduation thesis award.
2016	Honorary Graduate of UESTC. Top 10 in Yingcai Honors College.
2014	Meritorious Winner for CSIAM's China Undergraduate Mathematical Contest in Modeling.
2013	First Prize in Sichuan Contest District in China Undergraduate Mathematical Contest in Modeling.
2012	TANG Lixin Scholarship of UESTC. Top 60 out of over 25,000 undergraduate and graduate students at UESTC.
2012	Rank No.1 in entering UESTC from Yunnan Province (Score: 614).