What exactly does China Unicom's "3G Network Optimization and Maintenance Engineer" do?

It started with testing, sitting in the car all day long around the road to test signals. After the test, I came back to analyze the data, discover problems, and propose solutions. Very tired, traveling every day. Of course, if you join China Unicom directly, there will be no or very few tests and business trips, and you will not be too tired. The future is pretty good, and a salary of 5,00 in the later stages should be no problem.