At the same time, local regulations on the overall control of the production, transportation, trading and use of such chemicals were formulated in provinces such as Yunnan and Sichuan that border on the sourcelands of narcotic drugs.

• 临近境外毒源地的云南、四川等省，还制定了对易制毒化学品的生产、运输、经营和使用进行全面管制的地方性法规。