In or der to e nsur e normal tea ching or der, prote cting st ude nts ' hea lthy growt h, ensuri ng that nati ona l (property) is not l ost, to prevent or minimize the occurrence of safety accidents, foll ow the "prevent, re scue each ot her, ensure safety and reduce losses" pri nci ple, a ccording to the l ocal conditi ons, make t he manageme nt system. 1, t he pri nci pal is t he responsi bility