In order to ensure normal teaching orde r, prote cting st ude nts ' healt hy growth, ensuring t hat national (property) is not l ost, to pr event or minimize the occurrence of safety accide nts, foll ow the "preve nt, rescue ea ch othe r, ensure safety and reduce l osse s" principl e, accordi ng to the local conditi ons, make the management system. 1, t he pri nci pal is the re sponsibility of sch