The purpose of the ceiling is to be beautiful. As long as it is beautiful and durable, there is no feng shui.
The core of traditional geomantic conception is axisymmetrical theory. That is, based on a certain point, a straight line is extended, that is, the direction of sitting on the mountain, and it is spread left and right along this straight line and spread back and forth to form a symmetrical figure.
Symmetric figure refers to a figure, which is folded in half. Along this line, the characters on both sides can completely overlap, balance left and right, and balance back and forth, which is considered to be the most standardized Feng Shui scheme.
In the natural state of the site, the terrain is complex, but the basic idea is to find the balance point of relative and symmetry and evaluate the concept of symmetry of the central axis. Such as: Zuo Qinglong, right white tiger; Vestibular case, leaning against the mountain; Tianxin uses ten things.
All activities are based on the thinking concept of axis symmetry. The concept of modern residence is: functional, practical, convenient, safe, beautiful and sanitary.