People welcome the manned submersible named Shenhai Yongshi, or deepsea warrior, on board the ship Tansuo-1, as it returns to port in Sanya, south China's Hainan Province, Oct. 3, 2017. 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/Sha Xiaofeng)

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