What are the characteristics of quadrangles?

The characteristics of quadrangles are as follows:

1, square courtyards with different scales

2. The appearance is regular and symmetrical.

The yard is closed and private.

4. Clan concept

5. Social class

As shown below, it is a typical quadrilateral.

Siheyuan, also known as Siheyuan, is a traditional quadrangle building of Han nationality in China. Its pattern is a courtyard surrounded by houses, so it is named quadrangle.

Siheyuan is a kind of house, and there is a gatehouse in front of Sanheyuan to close it up. If it looks like a "mouth", it is called a courtyard; The shape of "sky" is called binary courtyard; The shape of "wood" is called Sanjinyuan.