N'oge na-adịbeghị anya, ozi ọma sitere n'aka ụlọ ọrụ China Railway No. 10 Bureau Material Trading Company na e tinyere usoro mmepụta mbụ nke China Railway n'onwe ya maka ihe nchekwa ọsọ dị elu n'ọrụ na Jinan. Mgbe anwalechara ya, ọkpụrụkpụ ngwaahịa ahụ, ịdị mma ya, ihe ndị e ji arụ ọrụ na ọkpụrụkpụ oyi akwa mgbochi-corrosion nke ihe nchekwa ọsọ dị elu nke ahịrị mmepụta a mepụtara na-emezu ihe achọrọ nke ọkọlọtọ mba.

A kọrọ na e tinyela usoro mmepụta ihe nke ọma mgbe otu afọ gachara mgbe e lechara ya anya nke ọma, nkwenye ọrụ, nyocha asambodo, ịzụta akụrụngwa, nchikọta onwe onye, ​​idozi ngwaọrụ, na ọzụzụ ọrụ. Ọ nwere ike imepụta ihe nchekwa dị elu nke nwere ebili mmiri atọ, kọlụm, ihe mgbochi ngọngọ, nke nwere ikike mmepụta kwa ụbọchị nke ruru tọn 80, nke bụ ihe dị mkpa maka ụlọ ọrụ China Railway No. 10 Bureau Materials Trading Company iji wuo usoro ngwaahịa dị iche iche ma gbasaa usoro ọkọnọ. Mgbe ọrụ ahụ ruru ikike mmepụta, ọ ga-egbo mkpa nke ọrụ dị iche iche dị elu iji zụta ngwaahịa nchekwa dị elu.