The saying of "big mouth and small mouth" at the door is: the big mouth and small mouth at the door will definitely not last long. For modern people, this is just an old and interesting riddle, which has no scientific basis and should not be widely quoted by modern people.

There are many solutions to the situation that the gate faces the small door. For example, a set of five emperors' money can be placed under or on both sides of the small door, which can better adjust the unfavorable pattern of the door to the door. At the same time, you can also add a partition between the two doors or change the orientation of the doors to avoid the two doors facing each other.

The above contents are for reference only, and the specific situation depends on the situation. It is recommended to consult experts in related fields for more professional advice.