What version is used in Chongqing's high school textbooks?

This kind of problem meets me, forget it. All subjects in Chongqing Senior High School are published by PEP. Directly under the city: Chongqing Nankai Middle School Chongqing Bashu Middle School Chongqing No.1 Middle School Chongqing No.8 Middle School Chongqing Yucai Middle School Chuanwai Affiliated Middle School Xishi Middle School Jiangjin City: Jiangjin Middle School Tongliang County: Tongliang Middle School Rongchang County: Rongchang Middle School Yuzhong District: Chongqing Qiujing Middle School Banan District: Chongqing Baxian Middle School Nan 'an District: Chongqing No.11Middle School Hechuan District: Chongqing Hechuan Middle School Jiangbei District: Chongqing The reason why it is changed once every three years is mainly to adapt to the development of the times on the one hand, and to have the least impact on the college entrance examination for students on the other.