A deep-sea submersible, developed by the Shanghai Ocean University, has reached depths of 4,000 meters during a trial operation from September 26 to October 25 in the South China Sea. The "Rainbow Fish" submersible is expected to reach depths of 11,000 meters by 2016. It can go down deeper than the nation's first deep-sea submersible "Jiaolong," which touched depths of 7,000 meters. The submersible will probe under the 26 oceanic trenches beneath 6,500 meters. It has three seabed landers, both unmanned and manned. It will try to reach the depths of 11,000 meters under the Mariana Trench in 2019 with a researcher onboard. The project also includes a mother ship named "Zhang Jian" named after an entrepreneur and educationist in modern China.