Why is it that in the city the door is closed when people get off work, and the same building does not get along with each other?

City people and people get along with most of the time is not long, the community is also relatively unstable in rural areas, most of the people in the city are moving in from abroad, but also have their own hometowns, have their own dialects, living in the city community is like living in a foreign country more or less wary of outsiders, after all, this society is a lot of bad people, unlike the countryside are from childhood to live with a piece of either the same last name or more or less some kinship to know their roots, and speak the same dialect, so better to get along. The dialect they speak is also the same, so it is better to get along with each other. If you want to harmonize, you need to increase some collective activities, like square dancing.