What are the basic forms of roofs formed by wooden structures in Han Dynasty?

There are five basic forms of roofs formed by wood structure in Han Dynasty-pointed hall, suspended hill, dunding roof, Cang Xie and inclined hill, among which pointed hall and suspended hill are widely used. At that time, the rest peak was composed of a suspended peak in the middle and a single shelter around it, while the houses in Han Dynasty were composed of three types. When the structure is combined for the first time, a terrace is naturally formed between them, which becomes an overlapping form. In addition, in the Han dynasty, by combining the roof of the palace with the eaves, a double-eaved roof was developed.