China completes deep-sea research mission in Mariana Trench

A conference on displaying the fruitful results in the deep-sea research mission is held at the Institute of Deep-sea Science and Engineering of the Chinese Academy of Sciences 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)