Zhaotong Xiao Sheng's initial exam is not a unified exam. Xiaoshengchu is the abbreviation of primary school students entering junior high school. Junior high school entrance examination, junior high school entrance examination and senior high school entrance examination are listed as the three major examinations for primary and secondary school students. Because junior high school students are not allowed to take the unified examination, key middle schools have attracted much attention according to their own standards. A few years ago, junior high school mainly looked at the test results of mathematics competitions such as China Cup. In recent years, the admission of outstanding students in key middle schools mainly refers to the comprehensive quality test results. Due to the limited enrollment of high-quality schools, a large number of primary school students apply for a small number of key middle schools in May and June every year, which makes it difficult to enter the school nearby to some extent.