Haijian 137, a Chinese marine surveillance ship, patrols in the territorial waters surrounding the Diaoyu Islands in the East China Sea on Feb. 10, 2013. A Chinese marine surveillance fleet, which includes the Haijian 50, Haijian 51, Haijian 66 and Haijian 137 ships, carried out regular patrol missions in the territorial waters surrounding the Diaoyu Islands on Sunday, the first day of the 2013 Spring Festival. (Xinhua/Zhang Jiansong)
