What is Jiuji Xieshan made of?

Nine Ridges, also known as oblique peaks, is one of the roofs of traditional wooden buildings in China. It is named after the roof has one straight ridge, four vertical ridges and four ridges.

Xieding Mountain is composed of four sloping roofs, 1 normal ridge, four vertical ridges, four battle ridges and triangular walls with turning or vertical upper parts of sloping roofs on both sides, forming a mixed form of two-sloping and four-sloping roofs.