Crew member Qi Haibin studies the route for the dive mission of Jiaolong, China's manned submersible, in the South China Sea, south China, at the command base on board ship Xiangyanghong 09, May 9, 2017. Jiaolong conducted its last dive on Wednesday in the South China Sea during the second stage of China's 38th ocean scientific expedition. (Xinhua/Liu Shiping)