Manufacturing, sales and maintenance of high and low voltage transformers (operating activities can only be carried out after obtaining a production license); processing, sales and maintenance of high and low voltage transformers, high voltage metering boxes, complete sets of electric power equipment, power transmission and distribution and control equipment; processing, sales and maintenance of electric energy metering boxes; wholesale and retail of Wujinjiaodian and wires and cables; leasing of transformers and electric equipment; electric power technical consultation and technical services; housing and site leasing.