First, children who grew up in the countryside are educated. If they don't study hard, they will stay in the countryside to farm when they grow up. Only by studying hard and being admitted to a university can you have a chance to get ahead and stay in a big city to work hard and develop well. Compared with urban resources, urban resources are more than rural resources, and there are many discoveries after graduation. If you stay in the city after graduation, you will have a good development, so you will not choose to go back to the countryside.
Second, rural children will find that the development of big cities is very prosperous after they come to study in universities in big cities. In college, I met classmates from all over the country, received different education and cultural influences, and broadened my horizons. And I am surrounded by people with prospects and dreams, and I will treat them positively.
Third, rural children will choose to stay in big cities for development after graduation, in order to return to the countryside after making a career in big cities and realize their own value. Children who grow up in the countryside will find that many places in big cities are different from those in the countryside. Living in a big city will make you feel stressed. You must study hard and work hard to get ahead. Many people won't go back to the countryside if they don't succeed in winning glory for their families. When they have a career, they will think about benefiting their hometown.
Therefore, many people choose to stay in big cities after graduating from college, and their horizons will be broadened and their thoughts will be avant-garde.