These products are used in domestic and foreign subways, high-speed railways, airports, aerospace monitoring and other engineering and scientific research fields. Among them, the Yuanwang series of satellite exploration ships, which use multi-time zone ship master clocks, have participated in aerospace scientific research missions including the launch of the "Shenzhou" spacecraft; the urban rail transit network center clock system is used in the Beijing TCC (Beijing Network Management Center) project, which includes all subway line clock systems in the Beijing area under unified calibration and unified management, providing a time reference for all equipment.