The gate of quadrangles is usually opened in the southeast corner or northwest corner. The north house in the yard is the first one, which is built on the masonry abutment, bigger than other houses, and it is the owner's living room. There are east and west wing rooms on both sides of the yard, where the younger generation live. There is a corridor between the main room and the wing room for people to walk and rest. The walls of quadrangles and houses facing the street generally do not open windows, and the environment in the courtyard is closed and quiet.
There are large and small quadrangles in Beijing, but no matter how big or small, they are all made up of quadrangles surrounded by houses on all sides. The simplest quadrangle has only one yard, while the more complicated one has two or three yards. The deep house compound where rich people live is usually composed of several quadrangles side by side. There is also a partition wall in the middle.
Beijing quadrangle is an inner quadrangle surrounded by houses in the east, west, south and north. Beijing quadrangles, as the main architectural form that old Beijingers have lived in for generations, are well-known at home and abroad and all over the world.
Secondly, the composition of quadrangles has its uniqueness. Its courtyard is spacious, surrounded by independent houses and connected by verandahs, making it very convenient to live; Closed doors make quadrangles have strong privacy, and closed doors come from heaven and earth; All four doors in the courtyard are open to the courtyard, and home and music are beautiful; The spacious courtyard can also plant trees and flowers, feed birds and fish, and stack rocks and scenery to let residents enjoy the beautiful scenery of nature.
Siheyuan, a square or rectangular courtyard, is a combined architectural form of residential buildings in northern China. A family, living in a closed yard, leads a comfortable, leisurely and quiet life, enjoys family happiness and naturally has a relaxed atmosphere.