The second-level constructor examination includes two public subjects and one practical subject. Public subjects are relatively simple and exercises are not easy to understand. Therefore, some people buy a full set of secondary construction engineer training courses, and some institutions only sell single courses.
The second-level constructor exam is more difficult, especially for zero-based candidates. It is not so easy to pass the exam smoothly. Moreover, there are many test sites for the second-level constructor, and the examination scope is wide, which has certain requirements for the candidates' on-site work experience. Candidates with poor foundation will learn better in the training class.