Tansuo-1 loaded with the manned submersible Shenhai Yongshi sails off the Nanshan port in Sanya, south China's Hainan Province, March 10, 2020. China's science ship Tansuo-1 loaded with the manned submersible Shenhai Yongshi, or "deep-sea warrior," set sail Tuesday for the first scientific expedition this year for the missions of ocean resource exploration, geochemistry research and marine organism collection. (Xinhua/Guo Cheng)
