Chinese policemen are fully prepared to start off to carry out the joint anti-drug campaign on the Mekong River at the Guanlei Port in Xishuangbanna, Southwest China's Yunnan Province, April 20, 2013. It is the ninth joint action of China, Laos, Myanmar and Thailand since a joint statement on the river's safety by the four nations dated Oct. 31, 2011. The Mekong river is a major Southeast Asian trading route, where narcotics crimes continue to rage. (Xinhua/Wang Dingbin) 

Chinese policemen are fully prepared to start off to carry out the joint anti-drug campaign on the Mekong River at the Guanlei Port in Xishuangbanna, Southwest China's Yunnan Province, April 20, 2013. It is the ninth joint action of China, Laos, Myanmar and Thailand since a joint statement on the river's safety by the four nations dated Oct. 31, 2011. The Mekong river is a major Southeast Asian trading route, where narcotics crimes continue to rage. (Xinhua/Wang Dingbin)