23 doors. National Open University construction engineering management professional requirements examination, engineering drawing and CAD, building materials, building structure, management foundation, introduction to engineering management, construction engineering laws and regulations and related knowledge, construction engineering project management, construction engineering economy, construction contract management, construction and organization, engineering evaluation, engineering construction supervision, construction engineering quality inspection and accident handling, construction enterprise management and management, real estate development and management, project decision analysis and evaluation, Twenty-three courses, including construction project quality investment progress control, project cost pricing and control, project cost case analysis, housing construction project management and practice, construction engineering technology and measurement, and construction engineering supervision case analysis, were tested 23 times respectively.