File photo of a Chinese marine surveillance cruising next to a Japan Coast Guard patrol ship in the East China Sea, known as the Senkaku isles in Japan and Diaoyu islands in China

 
File photo of a Chinese marine surveillance cruising next to a Japan Coast Guard patrol ship in the East China Sea, known as the Senkaku isles in Japan and Diaoyu islands in China
An aerial photo shows a Chinese marine surveillance ship Haijian No. 66 (front) cruising next to a Japan Coast Guard patrol ship in the East China Sea, known as Senkaku isles in Japan and Diaoyu islands in China, in this September 24, 2012 file photo by Kyodo. Indonesia is buying submarines from South Korea and coastal radar systems from China and the United States. Vietnam is getting submarines and combat jets from Russia, while Singapore - the world's fifth-largest weapons importer - is adding to its sophisticated arsenal. Picture taken September 24, 2012. REUTERS/Kyodo/Files