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