Class 1 to Class 3. As of July 22, 2023, information released by querying the Nantong Xiaohai Middle School public account shows that the key classes in Nantong Xiaohai Middle School are Classes 1 to 3, and Classes 4 to 10 are ordinary classes, with 45 students in each class. Nantong Xiaohai Middle School strictly follows the "Four Stricts" requirements of "serious attitude, rigorous style, strict management, and strict measures" to create a good learning atmosphere for students.