Yin-yang angle is one of the architectural structures, and Yin angle refers to the concave corner, such as the angle between the top surface and the surrounding walls; Yang angle refers to a protruding angle, such as the angle formed by two walls at the corner of a walkway. If the error of the angle of yin and yang on the wall is large, it can be seen at a glance, which will affect the beauty of home decoration, and will also lead to the unsmooth installation and placement of cabinets and furniture, resulting in a waste of space. Yin and Yang angles are mostly 90 degrees. When accepting the angle of Yin and Yang on the wall, it is required that the angle of Yin and Yang be vertical and parallel to the sideline and the main body of the house, and the corner should be straight and square.
The angle of yin and yang is not necessarily 90 degrees or close to 90 degrees. According to the specific huxing, the angle will be different, but most of the angles are 90 degrees, which is correct. To sum up: concave is an inner angle and convex is an outer angle. It is very important to judge the craftsmanship of masons and painters and see the treatment of yin and yang angles. Whether it is straight, vertical and flat is the key to determine the level of masons and painters.