54th launch in 2021,China launches Tianhui-4 satellite--中国成功发射天绘-4卫星,2021年的第54次发射
The Tianhui-4 satellite was developed by the Fifth Research Institute of Aerospace Science and Technology Group, and is mainly used for scientific experiment research, land and resources survey, and geographic information surveying and mapping tasks. According to the plan, another satellite will be launched from Xichang Space Base in 5 hours.