The placement examination subjects involve Chinese, mathematics and foreign languages, but it mainly depends on math scores. The math problems in key middle schools are mainly Olympic math problems, and there are a few math problems in primary schools. Some schools investigate a small amount of junior high school math knowledge.

Placement examination refers to the internal examination that the school separates the experimental class from the ordinary class, the fast class from the slow class, the English experimental class and the mathematics experimental class according to the students' grades or specialties. Exams are mostly conducted in the first day of junior high school or freshman year, and there are two kinds of voluntary participation and compulsory participation. Among them, junior high school placement examination is more common.