Hey, brother, you don't understand the training of engineering colleges 147. 147 is the national civil aviation law. Civil aviation maintenance is licensed, not a college diploma. School 147 training is to get the basic license. There are two ways to obtain the basic license of civil aviation maintenance. One way is to pass the exam after two years of work, and the other way is to obtain it directly through the training institution recognized by 147. I'm from the School of Engineering of Flight Academy, and now I'm working as an intern.