The rail transit industry is an important field in China's implementation of the "going out" strategy, which mainly includes vehicle equipment, signal systems, power supply systems, communication systems, coupler devices, through passages, bogies, braking systems, traction systems, etc. In this field, our company mainly supplies A4-80, 1.4410, 1.4460, 1.4462, halfen groove bolts, Nord Lock, Hard Lock, J.Lan, etc. In this field, our main partners include the relevant subsidiaries and joint ventures of CRRC Corporation.