This is different. Elementary school is different from junior high school. For example, some places in mathematics use the China Normal University version, and Weifang changed it to the Qingdao version only last year. The China edition used to be the Soviet education edition, but now it is the people's education edition. The physics edition used to be the Shanghai Science Edition, but now it is the People's Education Edition.

Really, it's not tired to turn around! ! !