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The nine basic legal books refer to the second volume of the ninth grade, Morality and Rule of Law, with a total of 18 volumes, of which primary school 12 volumes. According to the close relationship with children's life, teaching materials are arranged in six life fields from near to far. In the same life field, according to the different learning difficulties, spiral arrangement method is adopted. The six volumes of junior high school revolve around individuals, families, schools, society, countries and the world.