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 prevent or minimize the occurrence of safety accidents, foll ow the "preve nt, rescue ea ch othe r, ensure safety and reduce l osses" prin cipl e, accordi ng to the local conditi ons, make the management system. 1, t he pri ncipal is the re sponsibility of schoo