The Chinese have a long memory of the effect that widespread drug addiction has on a nation and a people. It wasn't until Mao that the issue was addressed, and they were actually quite effective:

https://en.wikipedia.org/wiki/History_of_opium_in_China#Unde...

>The Mao Zedong government is generally credited with eradicating both consumption and production of opium during the 1950s using unrestrained repression and social reform.[9][10] Ten million addicts were forced into compulsory treatment, dealers were executed, and opium-producing regions were planted with new crops.

I have my doubts that the West will be able to adequately deal with the issue. They don't seem to have the stomach for it.