Shanghai controland Engineering Co. Ltd. (CLAND) to realize the components of the propulsion system is no longer fully supported by the original equipment manufacturer. In order to solve this critical problem, SEI launched specialized engineering and manufacturing procedures to ensure the availability of high-quality components and components, and the need for all kinds of traction motors and generators to fully recover, generators and auxiliary power equipment.

The peak of SEI's efforts and success is evident in steadily increasing the output of new coils, rotors, stators, armature, leading brands such as SKF bearings and other mechanical and electrical components.