A double rainbow is seen over the sea from the China's manned submersible Jiaolong, which conducts its dive in Yap Trench, June 5, 2017. There will be five dives for Jiaolong in the Yap Trench, and the last dive is planned for June 12. The dives will focus on research in deep-sea biotic communities and gene resources, according to scientists on the ship Xiangyanghong 09. (Xinhua/Liu Shiping)
