September 2023 1. The four primary schools in junior high school refer to history, geography, biology and politics. These four courses were started in Shanghai on September/Kloc-0, 2023, when the first day of junior high school started, and they continued to study until they graduated from junior high school. History, geography, biology and politics play an important role in the development of life, and are also listed as one of the key examinations in junior and senior high schools, and their scores account for a large proportion.