Is it still useful to immigrate to the United States for primary school?

It's no use. If it is a high school or university diploma, it can also be used as a reference for admission.

Applicants' academic performance in China, whether in high school or university, has two forms, one is GPA (Average Grade Point) and the other is Rank, which is graduation ranking. These two forms are the standards used by most schools in the United States to measure applicants' academic performance. By understanding the applicant's previous academic rankings and academic achievements, we can understand his academic potential.

If you study in primary school or junior high school, there will be a special exam to determine your grade division before entering school.