Chinese submersible Jiaolong descends to 4,811 meters in Mariana Trench

Liu Shiping registers samples during a dive in the Mariana Trench on May 23, 2017. China's manned submersible Jiaolong finished a dive in "Challenger Deep" in the Mariana Trench, the world's deepest known trench, on Tuesday. Xinhua News Agency journalist Liu Shiping descended inside the submersible along with scientists to 4,811 meters below the sea's surface. (Xinhua/Tang Jialing)