With the deeper implementation of the CWC, the priority of work of the Organization for the Prohibition of Chemical Weapons (OPCW) has changed from destroying the chemical weapons to monitoring and inspecting the industrial facilities. China has more industrial facilities to be monitored than any other country in the organization. On September 18, 2019, the State OPCW compiled and published the List of Part of Category IV Monitored Chemicals (2019 Edition) and its index, which came into effect on the same day.