JIU QUAN, MAY 12   :    China on Sunday launched a Long March-4C rocket, placing a satellite in space. The rocket blasted off at 7:43 a.m. (Beijing Time) from the Jiu Quan Satellite Launch Center in northwest China and sent the satellite Shiyan-23 into preset orbit. The satellite will mainly be used for space environment monitoring. It was the 522nd flight mission of the Long March series rockets.(UNI)