Primary school is a school where people receive formal education in the primary stage and is an important part of basic education.
Generally, 6- 12 years old is the suitable age for primary school students. The length of primary education is 6 years, and in some areas it is 5 years. Courses offered include Chinese, mathematics, English, morality and rule of law, science and so on.
National defense security means that national defense is in an objective state without risk, foreign aggression and subversion, and witho