Shanghai Optical Instrument Factory (referred to as "Guangguang" in the industry) has a glorious history of 50 years. It has filled the domestic gap for the development of national industry and laid the foundation for the national optical industry. It has also cooperated with internationally renowned optical companies such as ZEISS-OPT0N and LEICA to produce various precision optical instruments. Afterwards. Through municipal engineering and land leasing, "Guangguang" has been optimized and combined into six major categories of optical measuring instruments, including physics, analytical instruments, medical instruments, microscopes, teaching instruments, as well as various optical lenses, special precision optical components, auxiliary materials, etc., produced by Shanghai Optical Instrument Factory 5 and Factory 6.