Let's talk about civil aviation maintenance. I'm thinking about changing that major.

Maintenance is ground maintenance, maintenance after the plane comes down, including engine disassembly and maintenance. It seems that all the students in this major are studying engines now, so you have to know something about aircraft engines, including the principle and structure. In short, I think I should study it if I like it. If you learn well, there will be a great demand for this major in the future and the salary will be good.