China completes deep-sea research mission in Mariana Trench

Scientists of the expedition greet the welcoming crowd after returning to the home port in Sanya, south China's Hainan Province, Oct. 16, 2018. A team of 59 Chinese researchers returned Tuesday to Sanya from the Mariana Trench after completing a 54-day, 7,292-nautical-mile deep-sea research mission. (Xinhua/Liu Deng)