1. The main building project refers to the load-bearing structural system which is based on the foundation, accepts, undertakes and transmits all the upper loads of the building project, and maintains the structural integrity, stability and safety.

2. Concrete Engineering: (1) Formwork Engineering (2) Reinforcement Engineering (3) Prestressing Engineering (4) Concrete Engineering (5) Cast-in-place Structure Engineering (6) Assembled Structure Engineering (7) Concrete Structure Sub-division Engineering,

3. Masonry engineering: (1) Basic regulations (2) Masonry mortar (3) Brick masonry engineering (4) Small concrete hollow block masonry engineering (5) Stone masonry engineering (6) Reinforced masonry engineering (7) Filled wall masonry engineering (8) Winter construction,

4. Steel structure engineering: (1) Basic regulations (2) Entry of raw materials and finished products (3) Steel structure welding engineering (4) Fastener connection engineering (5) Steel members and steel member processing engineering (6) Steel member assembly engineering (7) Steel member pre-assembly engineering (8) Single-layer steel structure installation engineering (9) Multi-layer and high-rise steel structures, etc.

5, the main project of high quality must ensure that the foundation is solid and stable. The main structure is safe and durable, and it is a fine project with strong internal strength and beautiful external beauty.