How many classes are there in the Qingbei class of Zhongxiang No.1 Middle School?

There are three classes in Zhongxiang No.1 Middle School. The official forum of Zhongxiang No.1 Middle School shows that one class is a liberal arts class, two or three classes are science classes, four or five or six seven classes are science experimental classes, eight classes are liberal arts experimental classes, nine classes are balanced classes, and all classes are balanced after the eleventh. So there are three classes in Zhongxiang No.1 Middle School.