The "ChinaSat 6C" satellite is launched by a Long March-3B carrier rocket from the Xichang Satellite Launch Center in Xichang, southwest China's Sichuan Province, March 10, 2019. With a Long March-3B rocket putting a new communication satellite into orbit on March 10, 2019, China's Long March carrier rocket series completed 300 launches, having sent more than 500 spacecraft into space since 1970. (Xinhua/Guo Wenbin)