In order to ensure normal teaching orde r, protecting students ' healthy growt h, ensuri ng that nati onal (pr operty) is not lost, t o preve nt or minimize t he occurrence of safety accide nts, follow the "preve nt, rescue ea ch other, ensure safety and reduce l osses" principl e, accor ding to t he local conditions, mak e the ma nagement system. 1, t he pri nci pal is t he responsibility of scho