Soviet education edition. Nine-year compulsory education has different versions of textbooks. The second volume of mathematics in the first grade of nine-year compulsory education in Chizhou City is Jiangsu Education Edition, which refers to the series of primary and secondary school textbooks published by Jiangsu Education Publishing House. Chizhou, referred to as Qiupu for short, is a prefecture-level city under the jurisdiction of Anhui Province and one of the 27 cities in the central area of the Yangtze River Delta. It is an important port city along the Yangtze River, a national double-support model city and a national forest city.