In which corner does the gate of Beijing Siheyuan usually open?

The quadrangles used in the surrounding areas, mainly those in Beijing, are all located according to the eight diagrams. The main house is located in the north, which is the caretaker. If it is a candy house, the door must be opened, and the other one is in the southeast. Therefore, the gates of quadrangles are generally opened in the southeast corner.

The quadrangle is mainly reserved for people, and the central axis is symmetrical. The gate is in the southeast due south, and the gate is not opposite the main house. Hutongs in Beijing usually run east-west, which means that the gate opens in the southeast of the yard. The quadrangles used in the surrounding areas, mainly those in Beijing, are all located according to the eight diagrams. The main house is located in the north, which is the caretaker. If it is a candy house, the door must be opened, and the other one is in the southeast. Therefore, the gates of quadrangles are generally opened in the southeast corner.

Because the building in the north pays attention to the gate of the ridge house, the ridge is due north, and the five elements belong to water. The main house is built on a horizontal plane, which can avoid fire; Xun is the southeast, the wind in the five elements, and it goes in and out smoothly, so it opens the door of the southeast corner and takes out the auspicious meaning of peace.

Not only that, but the drainage system of the whole city of Beijing also follows this concept. As early as the Ming and Qing Dynasties, Beijing's water system entered from Jishuitan Shuiguan in the northwest and went out from Tongjiang in the southeast. Moreover, the Jinshui River in the Forbidden City in the Ming and Qing Dynasties also entered the water from the tunnel on the west side of Shenwumen and came out from the southeast of Luanjiaku.