Because the textbooks used in Nanjing and Changzhou are different. Nanjing junior middle school Chinese is the People's Education Edition, mathematics book is the Soviet Education Edition, chemistry book is the Soviet Education Edition, English book is Oxford, natural science is the Zhejiang Education Edition, and history book is the People's Education Edition. The geography book is the People's Education Edition. Ideology and morality are the people's education edition. But most of Changzhou junior high school textbooks are people's education edition. Therefore, the textbooks are different, and the test papers for the senior high school entrance examination are naturally different.

Nanjing generally refers to Nanjing. Nanjing, referred to as Ning for short, is a prefecture-level city, provincial capital city, sub-provincial city, megacity and the core city of Nanjing metropolitan area under the jurisdiction of Jiangsu Province. Changzhou, also called Longcheng for short, is a prefecture-level city under the jurisdiction of Jiangsu Province and a city in the central area of the Yangtze River Delta.