In 2022, the fourth grade mathematics in Jinjiang District of Chengdu used the textbook of Beijing Normal University. According to public statistics, all primary and secondary school textbooks in Chengdu are published by Beijing Normal University. The textbook versions of mathematics mainly include: Beijing Normal University Edition, People's Education Edition, Suzhou Branch Edition, Beijing Education Edition, Shandong Education Press, China Normal University Edition, Zhejiang Education Edition and Hunan Education Edition.