No, according to official website of Sanshui Middle School, there are only two key classes in Sanshui Middle School, and the others are all key classes. Because the pressure in key classes is too great and the learning atmosphere is too tense, the free learning atmosphere in ordinary classes is better, even if it is not in key classes, it will not be bad. Sanshui Middle School is a famous Lingnan school with a history of nearly 100 years. It is a public high school directly under the Sanshui District Education Bureau.