China lifted a Long March 4B carrier rocket on Friday morning to place several satellites into space, marking the 400th launch of the Long March family. The rocket blasted off at 8:11 am from the Jiuquan Satellite Launch Center. The payloads in the mission－Shijian 6-05 satellites－are tasked with spatial environmental surveying and new technology demonstration.

12月10日8时11分，我国在酒泉卫星发射中心用长征四号乙运载火箭，成功将实践六号05组卫星发射升空，卫星将用于开展空间环境探测和新技术试验验证。这次任务是长征系列运载火箭的第400次飞行。

China launched its first carrier rocket－a Long March 1－in April 1970 to send its first satellite, Dongfanghong 1, or East Red 1, into space.
1970年4月，我国发射了第一枚运载火箭长征一号，将第一颗卫星东方红一号送入太空。

Since that first launch in 1970, the Long March carrier rocket series has carried out 92.1% of China's space launch missions. Over the past 51 years, the Long March series has sent more than 700 spacecraft into space. The overall success rate of the Long March fleet is 96.25%.
此后，长征火箭51年间实施了我国92.1%的航天发射任务，先后将700余个航天器送入太空，发射成功率为96.25%。

In the 400 launch missions by Long March rockets, the first three 100 launches were completed in 37 years, 7 and a half years, and more than 4 years, respectively. The latest 100 launch missions were carried out within only 33 months, since March 2019.
在400次发射里，前三个100次分别用时37年、7年半和4年多，而从2019年3月发射次数达到300次，到如今的400次，仅用了33个月。