On May 22nd, the 10th China Satellite Navigation Annual Conference was held in Beijing. Wang Zhaoyao, chairman of the China Satellite Navigation System Committee, revealed that China will launch 6 to 8 Beidou-3 navigation satellites this year to continuously improve system performance. In 2020, a world-class satellite navigation system (Beidou No. 3 system) will be built to provide better quality. Service; In 2035, a comprehensive positioning and navigation time (PNT) system with Beidou as the core and more ubiquitous, more integrated and more intelligent was built.