Yes According to the 2023 textbook notice issued by official website, Chongqing Education Bureau, in 2023, the second-grade primary school mathematics textbook in Chongqing will adopt the PEP version. Chongqing, also known as "Mountain City" or "Jiangcheng" for short, is a municipality directly under the Central Government of the People's Republic of China, a national central city, a megacity, one of the important national central cities approved by the State Council, and an economic center in the upper reaches of the Yangtze River.