Chinese submersible Jiaolong to dive in Yap Trench

Scientific research team members test ocean water with a device CTD on board of Xiangyanghong 09, the mother ship of China's manned submersible "Jiaolong", June 3, 2017. Jiaolong plans to conduct five dives in the Yap Trench starting June 4. (Xinhua/Liu Shiping)