In order to e nsure normal tea chi ng order, protecti ng student s ' healt hy growth, ensuring t hat national (pr operty) is not lost, t o preve nt or minimize t he occurrence of safety a cci dents, fol low t he "prevent, re scue ea ch other, ensure safety and reduce losses" pri nci ple, a ccordi ng to the l ocal conditi ons, make t he manageme nt system. 1, the pri nci pal is the responsibility o