70th Anniversary of Beijing Time---High Accurate Ground-based Time Service System

70th Anniversary of Beijing Time---Chinese Area Positioning System（CAPS）

70th Anniversary of Beijing Time---BeiDou-1

70th Anniversary of Beijing Time---National Time Service Center

70th Anniversary of Beiing Time---Low Frequency Time-code Time Service Station

70th Anniversary of Beijing Time---Long Wave Time Service Station

70th Anniversary of Beijing Time---Atomic Time System

70th Anniversary of Beijing Time---Short-wave Time Service Station

70th Anniversary of Beijing Time---Shaanxi Astronomy Observatory

70th Anniversary of Beijing Time---Beijing Shahe astronomical workstation of National Astronomical Observatories