When purchasing, priority should be given to selecting source manufacturers with complete testing and after-sales support to facilitate subsequent equipment maintenance, technical consultation, and reduce later usage costs. Low light night vision equipment belongs to precision optical instruments, and professional technical support is required for later tube detection and whole machine calibration. Choosing the source factory not only provides technical answers, but also ensures better maintenance in the later stage. In the early stage of procurement, it is possible to fully communicate with the manufacturer about their usage scenarios and environmental conditions, and ask the manufacturer to assist in matching suitable models to avoid equipment procurement that does not match the actual working conditions.