How big is the profit of the fourth railway project?

20%-40%。 According to Tencent News, the four-power project is a follow-up project after the station project is completed. The quality of the project is directly related to the normal operation of the train and the maintenance of the railway by the management unit after the operation. The general profit is 20%-40%. The communication, signal, electric power and electric traction power supply project in high-speed rail construction is the "central brain" and power source of the whole high-speed rail, and it is the last pass in high-speed rail construction.