People's Liberation Army Capt. Wang Weijin samples purified water from the U.S. miniature deployable assistance water purification system at a disaster site in Biang, Brunei Darussalam, June 19 as part of the Association of Southeast Asian Nations Humanitarian Assistance/Disaster Relief and Military Medicine Exercise (AHMX). Engineers with China, Singapore and the U.S. demonstrated their water purification capabilities to senior leaders at the disaster site. Weijin is a Chinese engineer. - People's Liberation Army Capt. Wang Weijin samples purified water from the U.S. miniature deployable assistance water purification system at a disaster site in Biang, Brunei Darussalam, June 19 as part of the Association of Southeast Asian Nations Humanitarian Assistance/Disaster Relief and Military Medicine Exercise (AHMX). Engineers with China, Singapore and the U.S. demonstrated their water purification capabilities to senior leaders at the disaster site. Weijin is a Chinese engineer.