There is no strong evidence of heroin production in China, but it produces limited amounts of opium, mostly for domestic consumption. PRC officials estimate that most of the illicit opium seized in China is smuggled in from Burma, while only about 10 percent originates in China. In addition to cultivation in the provinces bordering the Golden Triangle, smaller amounts of opium poppies were reported in the Northwestern Province of Ningxia. Most heroin entering China is produced in Burma, near the Chinese border. However, some of the opium smuggled into China comes from Vietnam.
Traffickers usually bring in heroin through Yunnan province.
Some shipments move directly across the Sino-Burmese border, and some enter southeastern Yunnan from Vietnam. A portion of the Golden Triangle heroin of uncertain origin flows into Guangxi Province from Vietnam. The PRC encourages citizens to report on possible cases of drug smuggling and use. In Yunnan, where local efforts at demand reduction are most organized, anti-drug organizations are involved in identifying drug users, providing treatment and trying to prevent addicts from backsliding. As the domestic drug problem has grown, efforts have been made to increase drug treatment programs.