YOEC is mainly engaged in R&D, production and sales of five main products, namely special optical products Fiber optic cables, special optical equipment, new materials, high-end equipment and optoelectronic systems, and provide customers with calibration and testing services through optoelectronics major metrology laboratories. YOEC is the core product and is used for fiber optic coils of fiber optic gyroscopes (FOG). It is the only enterprise in China that connects the upstream and downstream industrial chains of fiber optic coils. YOEC has a variety of core technologies and invention patents, and has applied various products to industries such as aerospace, smart grid and ocean monitoring.