Chinese research vessel completes 2017 deep sea exploration

Scientist Deng Xiguang introduces a sample collected during a marine scientific research after return in Dongguan, south China's Guangdong Province, Jan. 30, 2018. Chinese ocean scientific research vessel Haiyang-6 returned to Dongguan Tuesday after a 219-day deep-sea geological survey and marine research. (Xinhua/Wu Lu)