Is the empty door frame a door? Feng shui.

The building size of the ancients was calculated along the outer edge of the house according to the actual size of the whole building, so the size of the doorway also refers to the size of the doorway. However, the ancients paid attention to suppressing white. Lu Ban's real feet are one foot, four inches and four minutes, divided into eight characters, and the length of each character is one inch and eight minutes, so the door opening can be pressed white, and the door leaf can also be pressed white.