A ceremony is held by the Hainan Maritime Safety Administration on the patrol vessel "Haixun 21" in Haikou, capital of south China's Hainan Province, April 3, 2013. A fleet of five marine surveillance ships will monitor maritime traffic safety, investigate maritime accidents, detect pollution, and carry out other missions around the clock during the Boao Forum for Asia Annual Conference 2013 in Hainan. (Xinhua/Zhao Yingquan)

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