Information retrieval : 28th China Conference CCIR 2022 Chongqing China September 16 18 2022 : revised selected papers This book constitutes the refereed proceedings of the 28th China Conference on Information Retrieval CCIR 2022 held in Chongqing China in September 2022. Information retrieval aims to meet the demand of human on the Internet to obtain information quickly and accurately.The 8 full papers presented were carefully reviewed and selected from numerous submissions. The papers provide a wide range of research results in information retrieval area