Students from the Indonesian Naval Academy pose for a group photo in front of a submarine model at the People's Liberation Army (PLA) Navy Submarine Academy in Qingdao, east China's Shandong Province, April 21, 2014. Over 90 students arrived in Qingdao on Sunday by an Indonesian naval ship. The ship will take part in a multi-national marine exercise here marking the 65th anniversary of the founding of the Chinese PLA Navy. (Xinhua/Wang Jianmin)