called a "spy ship". Built by Jiangnan Shipyard, Yuan Wang 5 has a displacement of 25,000 tones, and is designed to withstand winds up to Beaufort scale 12, and perform duties in sea state 6. It has a carrying capacity of 11,000 tons DWT and its draught is reported to be 8.2 meters. Its length overall (LOA) is 222 meters and its width is 25.2 meters. Its home port is Jiangyin on the Yangtze. The general designer of both Yuan Wang 5 and 6 was Mr. Huang Wei (黄蔚), the general engineer of the 708th Institute of China Shipbuilding Industry Corporation (CSIC). Yuan Wang 6 Yuan Wang 6, like its sister ship Yuan Wang 5, is also a third generation tracking ship of Yuan Wang series. Designed by the 708th Research Institute, construction begun in April 2006, and the ship was launched on March 16, 2007. The ship entered service on April 12, 2008, and become fully operational in July 2008. Yuan Wang 6 utilizes fiber optic for its information system on board, and the electricity generated by the ship is enough to supply a city of 300,000. Specification: Length (m): 222.2 Width (m): 25.2 Displacement (t): 24,966 Accommodation: 400 Yuan Wang 7 Yuan Wang 7 was constructed by Jiangnan Shipbuilding, and is said to be able to operate for 100 days at sea. The China Satellite Maritime Tracking and Control Department has said the vessel will be used for maritime tracking of the Shenzhou 11 manned space mission, and the Tiangong 2 space laboratory, using three large dish antennae some 10–12 meters in diameter. It was commissioned on 19 July 2016. Length (m): 220 Width (m): tbc Height (m): 40m Displacement (t): 25,000 Yuan Wang 21 The Yuan Wang 21 is a cargo ship designed by the 708th Research Institute specially to transport rockets such as the Long March 5; construction began on 1 April 2012, and it was launched on 29 November 2012. Yuan Wang 21 entered service on 6 May 2013. Specification: Length (m): 130 Width (m): 19 Draft (m): 5.8 Displacement (t): 9080 Yuan Wang 22 Yuan Wang 22 is also a cargo ship designed specially to transport rockets such as Long March 5, and it is also built by Jiangnan Shipyard, the same builder of earlier Yuan Wang 21. Yuan Wang 22 might be a sister ship of Yuan Wang 21, but this cannot be