China successfully launched 2 space environment exploration satellites with a life-span of 2 years and manufactured by Shanghai Academy of Spaceflight Technology and China’s DFH Satellite Co Ltd on its Long March-4B carrier rockets.

Replacing earlier Shijian-6 rockets launched in 2004, these two satellites will conduct exploration of space environment, radiation in space and their influence, parameters of physical environment of the space, and carry out other related space experiments.