On March 13, 2021, at 02:19 UTC, the “Long March –4C” (“Changzheng-4C”) rocket-carrier was launched from the Jiuquan Satellite Launch Center in Jiuquan, Gansu Province, the northwest of China. The rocket orbited three “Yaogan-31” military spy satellites. The Yaogan name is used for Chinese military satellites. Yaogan satellites carry high-resolution optical, radar, and signals intelligence instruments, collecting information for analysis by Chinese military and intelligence agencies.