China tightens water security for 2014 Boao Forum for Asia (4/5)

Staff members of marine surveillance ships attend a ceremony initiating water security for Boao Forum for Asia Annual Conference 2014 at maritime base dock in Haikou, capital of south China's Hainan Province, April 4, 2014. A fleet of six marine surveillance ships will monitor maritime traffic safety, investigate maritime accidents, detect pollution, and carry out other missions during the Boao Forum for Asia Annual Conference 2014 in Hainan. (Xinhua/Wei Hua)