Changtai bụ ụlọ ọrụ na-emepụta igwe na Chengdu City China.Anyị na-ewu ma wụnye ahịrị mmepụta zuru ezu maka mpempe akwụkwọ atọ.Gụnyere akpaaka Slitter, Welder, mkpuchi, Ịgwọ, Usoro Nchikota. A na-eji ígwè ọrụ na-arụ ọrụ nke nkwakọ nri, nkwakọ ngwaahịa kemịkalụ, nkwakọ ọgwụ, wdg.