Shanghai Electric is focusing upon the area of rail traffic and shipping equipment including joint ventures with Alstom, Faiveley, GE and other multinational corporations. The production includes vehicle traction systems, power supply systems, platform equipment and air-conditioning equipment for vehicles. Shanghai Electric supplies complete sets of equipment for the rail traffic industry. The metropolis series rail traffic vehicle manufacturing technology, introduced from France by Shanghai Electric, utilizes the VVVF traction inverter technology with IGBT power electronic components. By adopting a modular design it is capable of producing different types of standard vehicles on the same production line, greatly enhancing the adaptability of the vehicles and overall production efficiency.