The structural form of this project is a frame structure, using raft foundations. Concrete: C30 is used for columns, walls, beams, slabs and stairs, and C15 plain concrete is used for the cushion, with a thickness of 100mm, and each side is 100mm wider than the foundation side. Waterproof concrete is used for the top plate, bottom plate and outer wall of the project, with the impermeability grade of P6. Ordinary concrete is used for other internal structural members.