Chinese research ship "Xiangyanghong 10" docks at Changzhi Island pier in Zhoushan of east China's Zhejiang Province, Aug. 12, 2018, after completing China's 49th ocean expedition. "Xiangyanghong 10" departed on Dec. 6, 2017, with scientists onboard set to explore polymetallic sulphide deposits in the southwest and northwest Indian Ocean. (Xinhua/Yao Feng)