3月17日，中国目前最大的渔政船--中国渔政311船，抵达西沙永兴岛，在中国南海海域履行宣示国家海洋主权和捍卫渔业、渔民权益的任务。
China's largest fishery administration ship has arrived in the Xisha Islands, after its week-long maiden voyage from its home port in Guangzhou.
The ship arrived around noon on Tuesday. Earlier, it anchored at the major island of Yongxing.
The 46-hundred ton ship was formerly a naval vessel in the South China Sea Fleet. It's the administration's fastest ship, with a top speed of 22 knots.
Its main duties are escort and sea rescue operations in China's exclusive economic zones, including the islands of Xisha, Nansha and Zhongsha and Beibu Bay.
The ship also aims to enforce China's sovereignty over the South China Sea.