Is it taboo to spread the floor below the corridor indoors?

The indoor scheme is better than the outdoor scheme: the outdoor road is higher than the indoor ground, and once it rains, it is easy to cause rainwater to flow backwards. Raise the room, if not, put up pictures of splashing water in the rooms on both sides of the door, such as rolling in the sky, taking the lead, carp yue longmen and so on. In order to dispel the anger, earth-shattering pictures such as "Gong Yu Moves Mountains" and "Jingwei Reclamation" were posted in the room opposite the door, just in case. However, when we are in our prime, we are not allowed to post earth-shattering pictures. Or the solution is simple: level the ground outdoors or raise the ground indoors.