From the reference you replied to:

> Effective May 1, 2019, China officially controlled all forms of fentanyl as a class of drugs. This fulfilled the commitment that President Xi made during the G-20 Summit. The implementation of the new measure includes investigations of known fentanyl manufacturing areas, stricter control of internet sites advertising fentanyl, stricter enforcement of shipping regulations, and the creation of special teams to investigate leads on fentanyl trafficking. These new restrictions have the potential to severely limit fentanyl production and trafficking from China. This could alter China’s position as a supplier to both the United States and Mexico