In the past, the approval numbers of drugs were "Shaanxi Wei Yao Zhun Zi (* *) * *" and Shanghai Wei Yao Zhun Zi (* *) * *, both of which were local standards. Since the establishment of the State Administration of Pharmaceutical Products in 2000, the drug approval number has always adopted the national standard, that is, "Chinese Medicine Zhunzi" is followed by an English number with 8 digits, English stands for drug type, and figures stand for province and approval time. Generally speaking, national standards are stricter and more standardized than local standards.