Middle school mathematics is relatively simple, which is equivalent to high school mathematics without depth. The content of middle school mathematics is roughly similar to that of ordinary high school mathematics, but the difficulty is much lower than that of ordinary high school.

Technical secondary school refers to secondary specialized schools, including public and private general technical secondary schools, adult technical secondary schools and technical secondary schools affiliated to colleges and universities. According to the website of the Ministry of Education, there are 3398 general secondary schools and 1 243 adult secondary schools in China.