Photo taken on Oct. 3, 2017 shows the manned submersible named Shenhai Yongshi, or deepsea warrior, on board the ship Tansuo-1 pulling into port of Sanya, south China's Hainan Province. China's new manned submersible, on board the ship Tansuo-1, returned to port in Sanya on Tuesday, after completing deep sea testing in the South China Sea. The manned submersible named Shenhai Yongshi reached a depth of 4,500 meters to test its functions and performance during an over 50-day expedition. (Xinhua/Guo Cheng)
