The GeN2?-MR, which has just completed the shipment of its 30,000th unit, is a composite steel belt small machine room energy-saving elevator built by Xizi Otis for China's green buildings. GeN2?-MR uses a number of Otis patented technologies including composite steel strips in its core design. By using composite steel belts instead of traditional elevator wire ropes, it can not only effectively improve elevator operating efficiency, but also improve ride comfort; the compact GeN2?