The door opposite the door is a glass mirror door, which can solve the problem

Glass will reflect light, just like a mirror, reflecting evil spirits, that is, bad yin or fierce feng shui, so when the glass is facing you, it will reflect bad things to your home. Generally speaking, it should not be used in modern residential areas of cities, which obviously harms others and does not benefit others, so you'd better talk to your neighbors, but don't quarrel about it, otherwise quarreling will have a negative impact on everyone. If you don't want to find a neighbor across the hall, you'd better use something that can dissolve and resist evil spirits, such as a feng shui compass or something with stronger wall effect, such as the money that you encounter with the Five Emperors for a long time, and hang it quietly above your indoor door panel, which can play a role in dissolving it. The principle of this solution is to eliminate evil spirits and stop the unfavorable impulse, not to reflect and keep the feud between the two families from rising, but to value harmony and generate wealth, which is good for both families.