The class quality of private schools in vocational education is very high. Course quality is the core competitiveness of higher vocational colleges. This is slightly different from other large training institutions. Different from many institutions, Pinzhi does not put marketing first, but pays attention to the research and development of course content in a down-to-earth way. All three levels of courses are taught by two teachers, He Xuan and Li Sike. At the same time, the course development is very careful and meticulous, and it is divided into six stages: guiding course, basic course, series of intensive lectures, classic special courses, original after-school special lectures and general evaluation courses.