On September 29, 2015 at 23:13 UTC (on September 30 at 07:13 Beijing time), the Chang Zheng-3B/IIG (Long March-3B/IIG) rocket-carrier was launched from Xichang Cosmodrome, Sichuan province, southwestern China. The rocket orbited the “Beidou I2-S” navigation satellite. t is the 20th member of the Beidou fleet launched by China.