China tightens water security for 2014 Boao Forum for Asia (5/5)

Maritime administrative law enforcement staff members are on duty on a marine surveillance ship in Boao, south China's Hainan Province, April 4, 2014. The provincial bureau of maritime affairs conducted site examination of water area in Boao on Friday, where the Boao Forum for Asia Annual Conference 2014 will be held. (Xinhua/Wei Hua)