Photo taken on March 30, 2018 shows the unmanned submersible "Hailong 11000" on the Chinese research vessel Dayang Yihao (Ocean No. 1) in the western Pacific Ocean. The unmanned submersible "Hailong 11000" completed its first sea test in the western Pacific Ocean Friday. The submersible entered the 410-meter-deep sea area from the Chinese research vessel Dayang Yihao (Ocean No. 1) at 4:45 p.m. (Xinhua/Chen Hao)

DAYANG YIHAO, March 30 (Xinhua) -- The unmanned submersible "Hailong 11000" completed its first sea test in the western Pacific Ocean Friday.

The submersible entered the 410-meter-deep sea area from the Chinese research vessel Dayang Yihao (Ocean No. 1) at 4:45 p.m.

Chu Fengyou, chief scientist of Dayang Yihao, said the vehicle is able to dive to a depth of 11,000 meters. It will complete an 11,000-meter-deep sea test in three years, according to the China Ocean Mineral Resources R&D Association.

The Dayang Yihao left Qingdao, Shandong Province, on March 20, taking scientists on a 45-day scientific expedition. The ship is carrying advanced scientific equipment and unmanned submersibles "Hailong" and "Qianlong."