Chinese People's Liberation Army sailors stand guard as the 12th Chinese Naval Escort Flotilla sets sail from Zhoushan, east China's Zhejiang Province, on July 3, 2012. Missile frigates Yiyang and Changzhou and comprehensive supply ship Qiandaohu departed from Zhoushan on Tuesday for an escort mission in Somali waters in the Gulf of Aden to protect commercial ships from pirate attacks (XINHUA) |