Hello, I'm glad to answer your questions. The math class in Ziyang, Sichuan Province is China Normal University Edition. The English textbook is not clear. You can look at the cover of your textbook. There is a certain publishing house, which is the full name of the textbook edition. I'm from Shandong, and my math class is the version of Shandong Education Publishing House, which is called "Shandong Education Publishing House" for short. For example, your math textbook is from East China Normal University Press, which is "China Normal University Edition", and so is English. If the answer is satisfactory, welcome to adopt it as the best answer.