Crew members check China's manned deep-sea submersible Jiaolong in Sanya, south China's Hainan Province, April 8, 2017. The crew of China's 38th ocean scientific expedition returned to Sanya, Hainan Province, south China, Wednesday. The 59-day trip marks the conclusion of the first stage of a 124-day mission. (Xinhua/Zhao Yingquan)
