CYG SUNRI CO., LTD (hereafter referred to as “SUNRI”) is a State-level High-Tech enterprise which is owned by Changyuan Group, the listed company (Stock code: 600525, Shanghai). It was founded by State Grid Electric Power Research Institute in 1994 and located in Shenzhen High-tech Industrial Zone. CYG SUNRI is specialized in the development, design, production, sales and relevant technical services of protection and controlling for power system, distribution network automation and industrial automation. It is a famous High-Tech enterprise in the power automation field in China, whose products and services have been spread at more than 7,000 35kV~1000 kV substations in the national power grid. As one of the leading companies of the Relay Protection and Substation Automation control in China, CYG SUNRI is the main secondary equipment supplier of the State grid and Southern Power Grid Corporation and also the largest specialized corporation of power system automation in South China.