Guizhou Changzheng Electric Co. Ltd is the largest industrial electrical apparatus producer in southwestern China. The company mainly manufactures and sells low-voltage electrical components, relays and complete sets of electrical equipment. The company's products have received national and provincial technology advancement awards, state-level new product awards and are recognized as state and provincial-level 'famous brands' and are widely used in the fields of electric power, petrochemicals, metallurgy, railway, light industry and real estate.