Its lighting, moistureproof and heat insulation are better than those on the first and second floors.
Folks say that there are three layers of gold, three layers of silver, four layers, and three layers are the best, but four layers are also very good. Although the glass roof can't live in people, there is no such common problem as the top knot. Climbing stairs on the third floor is not tiring, restless and noisy, with normal lighting and smooth ventilation. The title of the golden layer is worthy of the name.