In or der to e nsure normal tea ching or der, prote cting st ude nts ' healt hy growth, ensuri ng that nati onal (pr operty) is not l ost, to prevent or mi nimize the occurre nce of safety accide nts, foll ow the "pr event, rescue each other, e nsure safety and reduce l osse s" principl e, accor ding to t he l ocal conditi ons, make t he manageme nt system. 1, t he pri nci pal is t he responsi bi