Chizhou third grade mathematics uses Su Jiaoban textbook. The textbooks used by schools in Chizhou City, Anhui Province from grade one to grade six are: Chinese Editorial Board (People's Education Edition), English People's Education Edition and Mathematics Soviet Education Edition. Chizhou, formerly known as Qiupu, Jiangzhou and Jiuhuafu, is a prefecture-level city under the jurisdiction of Anhui Province and a central city in the Yangtze River Delta. It is an important port city along the Yangtze River and the core city of South Anhui International Tourism Culture Demonstration Zone. By 2022, there will be three counties in the city 1 district, with a total area of 8,399 square kilometers, a permanent population of 1.328 million and an urban population of 800,000, with an urbanization rate of 60.23%.