The General Principles of the Civil Law stipulates that neighborhood buildings should be based on the principle of facilitating production and life. The post-builder shall not affect the normal use of the former builder.
This is just a principled provision.
From the perspective of safety and lighting, newly-built houses must be at least 2 meters away from neighbors' houses, so as to ensure that the houses between neighbors will not affect each other. If it is built next to each other, it will easily lead to the structural damage of adjacent houses.
Before building a house, we must consult with our next-door neighbor. Finally, we must give in a few meters to ensure that the foundation will not affect each other, generally more than 2 meters. If everyone builds a house on the edge of the land, then everyone will do so, and disputes will inevitably arise.