In order to e nsure normal tea chi ng order, protecti ng student s ' healthy gr owth, e nsuring t hat national (property) is not lost, t o preve nt or minimize t he occurrence of safety accidents, foll ow the "prevent, rescue each ot her, e nsure safety and redu ce l osse s" principl e, accor ding to t he local conditions, make the ma nagement system. 1, the principal i s the responsi bility of sc