China's manned submersible "Jiaolong" surfaces after its dive in the Mariana Trench, June 1, 2017. Jiaolong Thursday conducted its 20th dive in the Mariana Trench, the world's deepest-known trench, since 2012. (Xinhua/Liu Shiping)
China's manned submersible "Jiaolong" Thursday conducted its 20th dive in the Mariana Trench, the world's deepest-known trench, since 2012.
The dive began at 4:43 p.m. local time, with three crew onboard working underwater for half an hour.
During the mission, the crew studied deep-sea biotic communities and distribution of species in the trench. They also brought back sea water samples.
Observations and sampling were carried out along the sedimentary area and rock-fracture zone of the trench.
Jiaolong has completed the highest number of dives in the trench by a manned submersible, and has reached a depth over 6,500 meters on 12 dives.
This mission is the third and final stage of China's 38th oceanic scientific expedition.
"It provides us with the first-hand data and samples for the country's research in deep-sea science," said Wu Changbin, commander of the expedition's third stage.
