2. Secondly, in the basic structure, the building blocks are fixed on the trapezoidal structure at a specific angle as required to form a "bird's nest" structure.
3. Finally, after the foundation is established and the "Bird's Nest" is built, small building blocks are added at various positions of the building block combination as needed to make the building blocks more stable and beautiful. While perfecting the details, we should pay attention to ensuring the stability of the overall structure.