About mechanical and electrical... I'm short on points, so I'll give you 50 points to analyze it. .... Thank you.

Mechanical stuff is relatively intuitive, electrical is more abstract, experience is more important. These two professions complement each other, for a piece of equipment, mechanical complexity, electrical is simple, similarly, electrical complexity, mechanical is simple. Relatively speaking, the mechanical certificate is good to test a little, the development of slower; electrical involves too many things, the development of too fast, and belongs to the special industry, high requirements, do not insist on learning is not keep up with the development. According to the development prospects, or the future of the electrical better, of course, mainly depends on your level. As for the current mechatronics program, to be honest, is a four like, which is not elite, misguided. As for CAD, is to learn science and technology people must master.