Fully armored Chinese police officers line up as their patrol missions along the Mekong River starts in Guanlei, Dai Autonomous Prefecture of Xishuangbanna, southwest China's Yunnan Province, Dec. 9, 2011. Together with police departments of Laos, Myanmar and Thailand, China launched a water police squad here on Friday to participate in joint patrol along the Mekong River, following a shipping suspension caused by a deadly attack on Chinese ships in October. [Xinhua/Lin Yiguang]