What are the characteristics of traditional folk houses in Pingyao ancient city?

Most of these traditional houses are ancient buildings in Ming and Qing dynasties, mostly binary quadrangles and triple quadrangles with clear bricks and gray tiles. The architectural layout is rigorous, the axis is clear, the left and right sides are symmetrical, the primary and secondary are distinct, the outline is undulating, the appearance is closed, and the courtyard is deep. With exquisite wood carving, brick carving and stone carving, as well as paper-cutting and window grilles with strong local flavor, it is vivid and realistic, achieving the perfect unity of use function and architectural art.