In March 2023,the Japanese Circulation Society(JCS)published the"JCS 2023 Guideline on the diagnosis and treatment of myocarditis",which updates the classification,diagnosis,prognosis,treatment,and special types of myocarditis based on recent research progress.This article summarizes and interprets some key points of the 2023JCS guidelines,in order to provide practical guidance for clinicians in China to manage patients with myocarditis.