'flood dragon') is a Chinese crewed deep-sea research submersible that can dive to a depth of over 7,000 metres (23,000 ft), developed from the Sea Pole-class bathyscaphe.

The general designer is Xu Qinan (徐芑南), a former professor at the School of Naval Architecture, Ocean and Civil Engineering (船舶与海洋工程学院) of Shanghai Jiao Tong University (SJTU), who also designed many other Chinese submersibles and uncrewed underwater vehicles.

On June 27, 2012, the Jiaolong with two oceanauts reached a depth of 7,062 meters (23,169 feet) in the Mariana Trench in the western Pacific Ocean.

[2] It had its first test in South China Sea between May 31 and July 18, 2010, reaching a depth of 3,759 metres (12,333 ft) with three crew.

[4][5] Besides China, other countries that have developed deep-water technology include the United States, France, Russia, India[6] and Japan.