On January 25, 2013, Xuzhou Wandu Machinery Technology Co., Ltd., in order to adapt to the changes in the elevator market, under the leadership of the company's leaders, concentrated on technical advantages and resources, specially set up a medium-speed frequency conversion research team to overcome the problem of high-speed lifts. The research team lasted more than a month and completed all the processes from drawing design, sample making, processing, debugging to powering up the sample machine.

The perfect stand-up of the medium-speed inverter crane marks the technical improvement of Xuzhou Wandu Machinery Technology Co., Ltd. from low speed to medium speed. It also shows that Xuzhou Wandu has the processing and manufacturing capability of medium speed inverter.