After the signal major entered the railway, he worked in the telecommunication section, maintaining signal equipment, switches, switches, signal machines, track circuits, and room repair interlocking equipment including 6502 electric centralized, computer interlocking and power board. In the communication section, communication is the maintainer of GSM-R, dispatching telephone, communication telephone and other communication equipment on the railway, and these two sections may merge in the future. Kunming railway administration communication section, power supply section and telecommunication section have been merged into Guangtong. It is already a pilot unit.