Marijuana is extremely illegal in China, but in Yunnan, the province I'm in, it grows wild. Some of it is cultivated by local people to use as a spice in cooking, and to eat the seeds. My friends were on a home-visit the other weekend, and the father served them weed seeds. These same seeds can be bought in our county capital (which is about a 30 minute van ride away). Nobody smokes the marijuana, so the government just turns a blind eye to the whole affair.