Hengyang's textbook depends on which subject, because each subject is different. In general, Chinese is the People's Education Edition, and mathematics is the China Normal University Edition. Chemistry, physics, history and politics are all PEP editions. There are some people's educational English. Some are benevolent versions. Biology and geography are also published by PEP. As far as I know, these are all versions of textbooks. I wonder if there are any different private schools?