Nine classes. Official website of Zhenhai Middle School shows that there are 9 classes in Senior Three, including 2 innovative science classes, 2 liberal arts classes, 1 cross-regional science classes and 4 general science classes. Zhenhai Middle School in Zhejiang Province is a full-time public high school located in zhenhai district, Ningbo, which is affiliated to the Education Bureau of zhenhai district, Ningbo.