What are the four-word idioms that describe good neighborhood relations?

1, being good to neighbors means being close to neighbors and being friendly to neighbors;

2. Living in harmony means living in harmony with each other;

3, disaster relief and care for neighbors, indicating the obligation of neighboring countries or neighbors to help each other;

4, neighbors, neighbors around. It is also a metaphor for other closely related units;

5. Millions buying neighbors refers to the rarity of good neighbors.