How about railway electrical maintenance (contact network) work? China Railway Electrified Railway Operation Management Co., Ltd.

I have a classmate who works in this company, which is a subsidiary of China Railway Electrification Group. It mainly performs maintenance on the newly operated catenary project. My classmate works on the Beijing-Shanghai line from Tianjin to Dezhou, Shandong. The work location is in Tianjin and the salary is about 3,000 yuan/month. The operation management company mainly performs catenary maintenance and repairs on the new line. Daily tasks include: catenary inspections, catenary skylight operations, data measurement, etc. It's quite hard. Especially in some sections, skylight work is done in the middle of the night, which is very difficult. As for the future of development, it depends on work performance, especially in such a large state-owned enterprise. Networking may be very important, but you must also have the ability to achieve better development. I heard my classmates say that he was the first college student in their class. There may be a shortage of talents in this area, and there should be better development prospects.