I don't know where this assertion in your question comes from, but I personally doubt it. Three of them are private undergraduate courses, and tuition and fees are far more expensive than one or two or less specialties. It is true that people from poor families may prefer to go to a junior college instead of considering three. After all, they really can't afford it.

And what is the definition of "lower-middle family"? As far as I know, most schools don't publish the income level of students' families, and most people don't share their family wealth with people around them. Moreover, college students usually come from all corners of the country, and the monthly income of 4,000 to 5,000 yuan is indeed the middle and lower reaches in first-tier cities, but it may be good in small cities in third-and fourth-tier cities, and even high in some remote mountainous areas-what data sources and standards can support your conclusion?

Regarding the explanation of the last question, although the three books are often unpopular in public opinion, they are actually in a neither high nor low position in the dimension of the whole society, with one book above and two books below. Although the level of students who can get into three books is definitely not good, it is definitely not bad. However, rich children are either arrogant from childhood, and their grades may be worse than three books. They can only go to a university vocational school, or spend money at home to find ways to study abroad. Or they have received a very good education since childhood. Students' vision, learning ability and achievement level are very high. Even if you don't choose to go abroad for a better education, staying at home will never be reduced to reading three books. Therefore, there may be relatively few real rich children in the three books-but it is absolutely impossible.

Please adopt it if it is useful.