(The first-level construction engineer majoring in electromechanical engineering is a project manager who understands technology, economy, management, and laws and regulations based on the major of electromechanical engineering. In the mastery of the compilation of mechanical and electrical engineering technology in this chapter, it is mainly based on the meaning of the sections, items and articles of the outline of the national first-class construction engineer qualification examination, and carefully organizes the selection of mechanical and electrical engineering majors from small to professional contracted projects, from the initial plan to the test. Involved in the general contracting of completed construction projects)