1. Orientation: The orientation of the door should conform to the principle of geomantic omen. Generally, it is better to face southeast, due south, southwest, due west and due north, but it is worse to face northeast, due east, northwest and due west.
2. Size: The size of the door should be moderate, and it is not good to be too big or too small. Too big will easily lead to family discord, too small will hinder wealth.
3. lintel: the height of lintel should be moderate, neither too high nor too low is good. Too high can easily lead to family disharmony, and too low will hinder wealth.
4. Door frame: The material of the door frame should be durable, such as mahogany and rosewood.
As for Buddhist niches, they can generally be placed on both sides of the gate, but be careful not to face the gate directly. The shrine is facing the gate, which will lead to the disorder of gas field and affect the health and fortune of family members. If you can't avoid facing the gate, you can consider placing a screen or green plants between the gate and the shrine to solve it.
It should be noted that the feng shui at the gate is not static and needs to be adjusted and improved according to the specific situation. If you have any questions or concerns about Feng Shui at the gate, it is recommended to consult a professional Feng Shui master.