A Z-9 helicopter prepares to land on the warship Jinggangshan in waters near south China's Hainan Province, March 20, 2013. Three warships of the South China Sea Fleet conducted confrontation maneuvers near Hainan early Wednesday. The Lanzhou, Yulin and Hengshui warships of the Chinese People's Liberation Army (PLA) Navy departed from Sanya in Hainan province on Tuesday along with the warship Jinggangshan. Simulated air and submarine attacks were staged as part of the drill.[Xinhua]