R&D, manufacturing and sales of power transformers, high-voltage switchgear, low-voltage switchgear, distribution boxes, power transmission and distribution equipment, power automation equipment, railway electric locomotives, wires and cables, instrumentation, lightning protection devices, high-voltage circuit switching devices and accessories, low-voltage circuit switching devices and accessories; electromechanical equipment design, installation, technical consulting, technical services; house rental; solar power generation; electricity sales.