What is the introduction of quadrangles?

The main courtyard is a full of green with deep penetration. In the middle of the courtyard is the main room, with the central axis running through it, facing south, which is the largest in the whole house, and the owner (elder) lives here. It also has an east wing and a west wing, and there is a small courtyard on both sides. Right in front of you is the wing, where the younger generation lives. Wings are small and shallow. There are corridors between buildings, and wet roads are not allowed in rainy days.