The BBC has published a report by Louisa Lim on drug use in Yunnan. It's available at:
http://news.bbc.co.uk/2/hi/asia-pacific/4085049.stm
The article focuses on the Dai ethnicity and tells of A Bao's addiction. The young man shoots heroin 4-5 times daily. Lim cites official statistics reporting 1 million addicts, but also notes that others put the estimate at 10-12 times that.
Unlike most goods, drugs are becoming cheaper in Yunnan. The article includes a description of a rehabilitation center Daytop.
It would be great to hear what others think of the problem and how the Chinese are addressing it. Beyond that -- how might this be discussed with our own students?