利害國2012 年已經去到7000米
https://en.wikipedia.org/wiki/Jiaolong_(submersible)
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.[1] Previously, on June 19, 2012, the Jiaolong reached a depth of 6,965 metres (22,851 feet).[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.[3] On July 22, 2011, Jiaolong reached a depth of 4,027 metres (13,212 ft) in northeastern Pacific. The five-hour mission included chemical, physical and biological research. Seventeen dives have been completed.[4][5]