At least a year. According to Nanjing Education Information, as of April 6, 2023, Shu Ren Middle School is within the scope of compulsory education, and the school district should actually move in at least one year in advance. Nanjing, referred to as "Ning", was called Jinling and Jiankang in ancient times. It is the capital of Jiangsu, a sub-provincial city, a mega-city, the core city of Nanjing metropolitan area, and an important central city in eastern China determined by the State Council.