On September 12, 2015 at 15:42 UTC, the Chang Zheng-3B/E (Long March-3B/E) rocket-carrier was launched from Xichang Cosmodrome, Sichuan province, southwestern China. The rocket orbited a super-secretive satellite unofficially claimed to be the Communications Engineering Test Satellite -1 (TXJSSY-1). The official announcement by the Chinese media described the satellite as a communication technology experimental satellite, without citing any official name.