There are 37 trenches with a global depth of more than 6000 meters. The area where these trenches are located is called the abyss of Haidou, or abyss for short. They are places in the global ocean that are hard to reach and know. Nine of the deepest trenches, including the Mariana Trench, are located in the Western Pacific Ocean, five of which are more than ten thousand meters deep.
The deep-sea manned submersible is also known as the 10000 meter manned submersible. In 2020, China's ten thousand meter manned submersible will visit the deepest "Challenger abyss" in the Mariana Trench, and a "big play" will be staged in the deep-sea "stage".
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