The biggest feature of Shanxi quadrangles is ().

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Siheyuan was left over from the old society before the founding of New China. This kind of quadrangle usually uses the door to enter and exit a quadrangle. Usually, when the gate is closed, it is in a completely closed state. Most of the courtyard doors of quadrangles use wooden doors. One end of the gate made of planks is placed in the shaft from top to bottom, which can be opened and closed, safe and reliable.

In the quadrangle, there is the main room, which is the north room. This is the first room in the courtyard. Generally, the direction of quadrangles is to sit north to south. On the east and west sides, there are east and west wing rooms. The east and west wing rooms are generally symmetrical, and the building formats are generally the same or similar. There is a south building in the south, corresponding to the north building. Most quadrangles are built symmetrically according to the "traditional" custom in China.

Siheyuan is a traditional quadrangle building in China. Its pattern is a courtyard surrounded by houses, usually consisting of a main room, an east-west wing and an inverted room. The courtyard is surrounded in the middle from all sides, hence the name quadrangle.

Although Shanxi residential quadrangles and Beijing quadrangles belong to the same type of quadrangles in the north, they are quite different in quadrangle types, architectural forms and decorative styles. Shanxi quadrangle has become a unique branch of the quadrangle family with its distinctive personality.

Shanxi is one of the "Jiubian Towns". Since ancient times, wars have been frequent, and big businessmen have paid special attention to housing safety. Shanxi folk houses emphasize defensiveness: the closed appearance of the courtyard shows the alert to the outside world, which seems to make Shanxi folk houses have a cold expression. The exterior walls of Shanxi residential courtyards are all gray fair-faced brick walls with simple colors and towering and closed appearance.

However, due to the interaction of different shapes such as door, roof, chimney cap, geomantic building and geomantic shadow wall, the outline of buildings along the street is full and stretched. Although Gu Zhuo is not out of date, it is unified but not monotonous, rich but not messy, exquisite but not trivial. Just as Mr. Liang Sicheng said, "the exterior is male and the interior is beautiful" is the characteristic of Shanxi folk houses.