70. According to the inquiry of Hengshui Education Bureau in official website, there are 70 children in a class of Grade Three in Anpingzhi Town, and Anpingzhi Town Middle School has a history of 10 years and a mature repeat reading system. This school has 22 repeat classes with 70 students in each class, and the repeat rate reaches 90%. Located 8 kilometers southeast of Anping County, Hengshui, it is a private boarding school covering primary school, junior high school and senior high school.