1, college students are generally 18 to 22 years old, and universities are generally four-year programs. In addition, we should consider the age of going to school in the first grade of primary school. In the first half of the year, I have to go to primary school for my sixth birthday, and in the second half of the year, my birthday is one year later, so my college age is different.

2. There are also college students who are younger than 18 years old or older than 22 years old, because some of them have skipped the grade because of their excellent grades or failed for some reason;

3. At present, China has established universities for the aged, among which the elderly are generally older.