There is no guarantee that you can go to the undergraduate course. The college entrance examination is a very serious matter, and you need to study hard to get good grades. No educational institution can guarantee that you can go to an undergraduate course.
The National Unified Entrance Examination for Colleges and Universities, referred to as "College Entrance Examination" for short, is a national unified selective examination for qualified high school graduates or candidates with equivalent academic qualifications. The national unified examination for senior high school enrollment is a national unified examination for college enrollment, which is generally held from June 7 to 8 every year.