Isu, Henan Yulin University.Iyo kambani Engineering Company LimitedIfekitari ine nhoroondo yemakore anopfuura makumi matanhatu, chirongwa cheCo., Ltd. chakavambwa muna 1958, guta rakanyoreswa remamiriyoni zana nemakumi maviri eyuan, vashandi vehunyanzvi varipo vanopfuura mazana maviri vanhu.Ikozvino yakura kuita inozivikanwa inotengesera michina yekudzidzisa inobatanidza tsvakiridzo yesainzi, kugadzira uye kutengesa.