Military helicopters fly over a Chinese navy ship during a fleet parade in the sea off Qingdao, east China's Shandong Province, April 23, 2009. President Hu Jintao, aboard the Chinese Navy destroyer Shijiazhuang, reviewed warships and aircraft Thursday afternoon off the coast of Qingdao to mark the 60th anniversary of the founding of the Chinese People's Liberation Army (PLA) Navy. [Xinhua]