Mother-child doors are generally larger and the surface gloss is better, so the house looks more beautiful and has a high-end style. In daily use, the mother-child door can only open one door, which is very practical.
However, from the perspective of geomantic omen, the mother-child relationship is unlucky, which will affect the residents' fortune to a certain extent, destroy the family fortune, and can't stay blessed. Because the master-slave door is composed of two doors, its firmness is relatively poor, so we should pay attention to both anti-theft and safety.