Nanjing Electric (Group) Co., Ltd. (Nanjing electro-ceramic factory) is the first HV electro-ceramic factory in the industry history of China and it was established in 1936. At present, it is the biggest production base of tempered glass insulator and the national significant technical equipments development and industrialization base. In recent years, it has been honored with nationwide engineering industry advanced collective and engineering industry modernization management enterprise.The Thunder-Lighting brand trade mark used by the company was registered in 1937, and now it is the famous trademark in Jiangsu Province. Company covers an area 330000 square meters, construction area of 140000 square meters, the registered capital is more than 300 million Yuan, and the total number of employees at present is 1007. Company possesses national laboratory (Nanjing electric testing center) and high voltage insulator engineering technology research center of Jiangsu Province and specially produce electrical product matching power transmission and transformation engineering construction. The market share of main products in the domestic insulator arrester industry takes the leading position. Since the first condenser bushing in China has been trial-produced in 1958 in the company, the solid foundation of condenser bushing production of our company is formed after more than 50 years’ production and fabrication experience accumulation. To satisfy the requirements of product upgrades in the new period, our company explore new materials, new technology of bushing based on the original production technology, and developed the first fiberglass reinforced dry-type capacitor successfully in the world in 2001, and also developed the series products of fiberglass reinforced dry-type bushing which is approved and popularly used by user. To highlight the bushing business, Nanjing Electric HV Bushing Co., Ltd was born in 2012.