Workers release the deep-sea submersible Jiaolong at Yap Trench in western Pacific Ocean on May 15, 2016. It was the first diving mission of Jiaolong at the area, and it reached 4,955 meters under the sea. (Photo/Xinhua)
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Workers release the deep-sea submersible Jiaolong at Yap Trench in western Pacific Ocean on May 15, 2016. It was the first diving mission of Jiaolong at the area, and it reached 4,955 meters under the sea. (Photo/Xinhua)
