Generally, a closed school is a school that concentrates teaching, food, accommodation and activities on the same campus.
Closed type is divided into fully closed type and semi-closed type. Fully enclosed requires that all basic necessities of life are within the scope of formulation; Semi-closed will be opened regularly or irregularly. For example, the closed training of sports athletes requires total closure, while the short-term training activities of some training courses may be semi-closed.