In order to ensure normal tea chi ng order, pr otecti ng students ' healthy gr owth, e nsuring that national (property) is not l ost, to prevent or minimize the occurr ence of safety accide nts, foll ow the "pr event, re scue each ot her, ensure safety and re duce losse s" principle, a ccording to the l oca l conditi ons, make t he manageme nt system. 1, t he pri nci pal is the responsibility of s