Officers and soldiers attend flag-raising ceremony on the board of Zhoushan missile frigate in Gulf of Aden, Aug. 1, 2009. The Chinese escort flotilla, two frigates and a supply ship from the Chinese navy, held celebrations on Saturday to mark the 82nd anniversary of the establishment of Chinese People's Liberation Army (PLA). The flotilla is on their escort mission to fend off Somali pirates. (Xinhua/Guo Gang)