A rewind of China's BeiDou Navigation Satellite System deployment

The 55th navigation satellite of the whole BeiDou Navigation Satellite System (BDS), also the last of the BeiDou-3 system, was successfully launched on June 23. China has built its largest Global Navigation Satellite System with the widest coverage and the highest service standards and one that is most closely related to life. Let's rewind how the BeiDou constellation has been built.