The 4th China Conference on Health Information Processing (CHIP) is the annual symposium of the Chinese Information Processing Society of China (CIPS) Technical Committee of Medical, Health and Biological Information Processing. CHIP is a leading international conference specialized in the fields of health information processing in China. It serves as a main forum for researchers and practitioners from academia, industry and government all over the world to share their ideas, research results and experiences for further promotion in the fields. The previous CHIP conferences were successfully held in Shenzhen (2015, 2016 and 2017). In the last three conferences, experts from USA and China shared their research results and experiences only by oral presentations. Since 2017, the conference has added a tutorial section and began to call for papers. In the tutorial section last year, invited speakers introduced fundamental tasks and methods in the medical informatics and shared their recent achievements. All accepted papers were recommended to SCI-indexed journals such as BMC Medical Informatics and Decision Making.