It's different. Shanghai junior high school mathematics textbooks mainly use Shanghai Education Publishing House (Trial Edition) (Shanghai Education Edition for short) and Shanghai Science and Technology Publishing House (Shanghai Science Edition for short). Anyway, most counties and cities in Shanghai use this textbook, and junior high school mathematics in Hangzhou uses Zhejiang Education Edition. There are six volumes in this edition, which are divided into two volumes in grade seven, two volumes in grade eight and two volumes in grade nine. Mathematics (or mathematics) is a subject that studies concepts such as quantity, structure, change, space and information.