Even the names vary from place to place. Beijing is the health treasure of Beijing, Shanghai is the applied health code, Tianjin is the Tianjin health code run by Jin Xin, Chongqing is the Yukang code, and Hebei is the epidemic prevention and health information code.
Shanxi province is Shanxi health code, Liaoning province is epidemic prevention and health information code, Jilin province is epidemic prevention and health information code, Heilongjiang province is epidemic prevention and health information code, Jiangsu province is Sukang code, etc. Other provinces only add city names and epidemic prevention and health information codes.