The entrance examination of nine schools in Hunan Province is a well-known high school entrance examination in Hunan Province, which is quite difficult. Take mathematics as an example. It is reported that less than 2,000 people have passed mathematics, with an average score of only 4 1, and most of them are around 25. This shows that mathematics subjects are difficult and require candidates to have a solid mathematical foundation and high problem-solving ability. In addition, other subjects of the nine-school entrance examination, such as Chinese, English, physics, chemistry, etc. It is equally difficult, requiring candidates to have a comprehensive knowledge reserve and a high comprehensive quality.