Shanghai Hegong Disc Spring Manufacturing Co., Ltd., subordinated to China National Nuclear Corporation (CNNC), is a military project enterprise specialized in manufacturing disc springs. It is also a member of Chinese General Machine Components Industry Association. The company is situated in Jiuting Town, Songjiang District, Shanghai, known as "the Pearl of Western Suburbs". It is linked to Shanghai-Hangzhou Expressway 4km to the south and 3km to the north with Shanghai-Qingpu-Pingwang Expressway (National Highway 318), therefore, the communication is very convenient.