JIE holding group, which was originated in 1988, covers an area of 200, 000m2 and the building area of 150, 000m2. Currently the group has three manufacturing factories, Hangzhou Wanjie Speed Reducer Co., Ltd. producing worm gear reducer, Hangzhou JIE Drive Technology Co., Ltd. producing helical gear reducer and Hangzhou Commansa JIE Construction Machinery Co., Ltd. producing flat top tower crane. Having imported the whole set of production line from Europe and America, like Germany and so on, JIE has the first class process and Inspection Line. The products are exported to Europe and America and offered specially drive equipment and service for the high-end customers.