On June 7, 2021, the Office of the State Council of China issued a letter [1] to inform related authorities and the public of the approval of listing 6 substances in the Catalogue and Classification of Precursor Chemicals. Related authorities include Ministry of Public Safety (MPS), Ministry of Commerce (MOFCOM), National Health Commission (NHC), Ministry of Emergency Management (MEM), General Administration of (GAC), and National Medical Products Administration (NMPA).