How about the north-south door?

If the two families have a good relationship, then don't worry, there is no big problem with Feng Shui. If the relationship between the two families is not very good, then pay attention. Shaqi is produced between two families. The best way is not to refract the suffocation to the other party. It is very appropriate to use feng shui products that can dissolve the suffocation, such as the Five Emperors and Long Wealth, so that everyone can live in harmony and maybe help each other in the future.