China says it has trained 115 drug-fighting policemen for Burma and Laos over the past year.
The official news agency, Xinhua, says the anti-drug cooperation among the three countries has improved in recent years.
It quotes Ministry of Public Security officials in Beijing as saying that over that period, China, Burma and Laos have signed agreements to strengthen coordination of anti-drug efforts.
The border area of Burma, Thailand and Laos makes up the so-called "Golden Triangle," one of the world's biggest opium production regions. Opium is used to make the illicit narcotic heroin.
Earlier this year, a United Nations report said opium production in the region had dropped significantly. It said opium cultivation was much lower in Burma -- the world's second largest grower of opium poppies after Afghanistan.
Laos -- the world's third largest producer -- also showed a drop in cultivation.