Fishery patrol ship returns from mission The largest ship in China's Fishery Administration has finished its patrol missions in the South China Sea and the North Bay Sino-Vietnam fishery cooperation zone. Local Fishery authority says the patrols have achieved effective results. The "China Yuzheng 311" sailed into Guangzhou, in southern Guangdong Province having found no trespassing vesicles on its patrol last month around Nansha, Xisha, and Zhongsha islands. The missions aimed to strengthen maritime surveillance in China's southernmost maritime territory.