Video: official WeChat account of China Aerospace Science and Technology Corporation 

Photos: official WeChat account of China Aerospace Science and Technology Corporation 

The first group of China's Yaogan-31 remote sensing satellites were sent into space on Tuesday at 12:25 p.m. Beijing time from Jiuquan Satellite Launch Center in northwestern China. 

The satellites were carried by a Long March-4C rocket, the 271st mission for the Long March rocket family.

The mission also sent a micro nano technology experiment satellite into orbit. 

The satellites will be used for electromagnetic environment surveys and other related technology tests.  

China launched the first "Yaogan" series satellite, Yaogan-1, in 2006. 

(With input from Xinhua)