Meanwhile, the demand for opium, heroin and yaba-style stimulants continues to rise, especially in China. It has at least 2m heroin addicts and possibly as many as 10m. Nearly all the supply comes through Yunnan province from the Golden Triangle. By many accounts demand is on the rise in Shan state itself, where drug addiction is now a problem, especially among the young. Nang Voe Phart, the head of a local NGO working to improve livelihoods in the eastern Shan capital of Kengtung, reckons that three-fifths of young people there regularly take yaba. Doctors in neighbouring Kayin state, home to the ethnic Karen people, say the proportion is similar there.