People's Education Edition (end of June 5438 +20231October 7) The textbook used in seventh grade mathematics in xiashan district, Zhanjiang City is the standard experimental textbook of compulsory education curriculum of People's Education Edition, which covers the content from primary school to high school and is used by most schools. Xiashan district, which belongs to Zhanjiang City, Guangdong Province, is located in Leizhou Peninsula, Guangdong Province, at the southernmost tip of Chinese mainland, near Zhanjiang Bay, with a coastline of 28km and a land area of1/7km2 near Sanlingshan Forest Park in the west.