Yunnan Yuanjin Optical Co., Ltd. has years of history for production and sales of the telescopes. Our main customers are army, armed police, government agency, schools, enterprises and institutions. Foreign customers are mainly in the United States, Canada, Japan, South Korea, Australia, New Zealand, Europe and the Middle East. We mainly provide quality products. Yunnan Yuanjin Optical Co., Ltd. has a complete set of quality assurance system to ensure the quality of the telescopes and to establish long-term stable cooperative relationship with customers. 

             I. From the beginning of the telescope design, based on years of experience, our company eliminates the shortcomings of previous products, adopts the optimized telescope design, and reduce the quality problem of the telescope from the source .

II. Be strict in quality control during the procurement of materials, we choose the high quality optical materials and metal materials, and have strict inspection when the material get to factory, which guarantees the quality of the telescope.

III. The assembly of the telescope is strictly in accordance with the telescope technology (the provisions of the telescope assembly). The inspection staff tests the products in the production line at any time.

IV. The assembled telescopes get through quality inspection in strict accordance with the product inspection standards and then get to the market. The company has a complete set of telescope testing equipment, and a high level of inspection personnel.

V. The military binoculars achieve military binoculars standards of US army military standard. all products pass the test of high temperature 55℃, low temperature of -40℃, waterproof 30 minutes 1 meters depth, 1.82 meters high drop

and vibration, which fully guarantee the normal use of troops in field training and operation. Other types of series, quasi military products have reached a quasi military standard, and are also fully able to ensure the normal use for the police, navigation etc..