Twenty days. The primary school training in Chaoyang District is mainly to cultivate children's good study habits and correct reading and writing habits. Children are lively and lovely, active. Good study habits are very important, and good study habits help to improve children's academic performance. First-year students can form good habits by training 20 days in advance. A primary school is a school where people receive primary formal education. It is an important part of basic education and belongs to nine-year compulsory education.