File photo taken on April 29, 2009 shows the Yuanwang 6 Space Tracking Ship. Yuanwang Space Tracking Ships of 3,5 and 6 undertake the telemetry, track and command missions for Chang'e II. China successfully launched Chang'e II, China's second unmanned lunar probe, on Oct. 1, 2010. The TTandC (telemetry, track and command) system for Chang'e II, mainly designed by Beijing Institute of Tracking and Telecom Technology (BITTT), was co-developed by Beijing Aerospace Control Center (BACC), Xi'an Satellite Control Center, China Satellite Maritime Tracking and Control Department, and Shanghai Observatory, etc.. The ground application system for Chang'e II was mainly developed by the National Astronomical Observatories, Chinese Academy of Sciences. [Xinhua]

File photo taken on Nov. 23, 2005 shows the Yuanwang 3 Space Tracking Ship. Yuanwang Space Tracking Ships of 3,5 and 6 undertake the telemetry, track and command missions for Chang'e II. China successfully launched Chang'e II, China's second unmanned lunar probe, on Oct. 1, 2010. The TTandC (telemetry, track and command) system for Chang'e II, mainly designed by Beijing Institute of Tracking and Telecom Technology (BITTT), was co-developed by Beijing Aerospace Control Center (BACC), Xi'an Satellite Control Center, China Satellite Maritime Tracking and Control Department, and Shanghai Observatory, etc.. The ground application system for Chang'e II was mainly developed by the National Astronomical Observatories, Chinese Academy of Sciences. [Xinhua]