Scientists from different countries visit China's manned submersible Shenhai Yongshi, or Deep Sea Warrior, on board China's research vessel Tansuo-2, or Exploration 2, in Sanya, south China's Hainan Province, July 12, 2023. (Photo: China News Service/Luo Yunfei)

The ship is 87.2 meters long and 18.8 meters wide, with a full-load displacement of 6,800 tons. It can carry 60 researchers and has a maximum speed of 14.2 knots and a cruising range of 15,000 nautical miles.

Two China's deep-sea submersible mother ships Tansuo-1 and Tansuo-2 dock at a pier in Sanya, south China's Hainan Province, July 12, 2023. (Photo: China News Service/Luo Yunfei)

Scientists visit China's deep-sea submersible mother ship Tansuo-2 in Sanya, south China's Hainan Province, July 12, 2023. (Photo: China News Service/Luo Yunfei)

A worker conducts maintenance on China's research vessel Tansuo-2 in Sanya, south China's Hainan Province, July 12, 2023. (Photo: China News Service/Luo Yunfei)

Scientists visit China's deep-sea submersible mother ship Tansuo-2 in Sanya, south China's Hainan Province, July 12, 2023. (Photo: China News Service/Luo Yunfei)

Scientists visit China's deep-sea submersible mother ship Tansuo-2 in Sanya, south China's Hainan Province, July 12, 2023. (Photo: China News Service/Luo Yunfei)

A remotely operated underwater vehicle (ROV) is installed on China's research vessel Tansuo-2 in Sanya, south China's Hainan Province, July 12, 2023. (Photo: China News Service/Luo Yunfei)