N'oge na-adịbeghị anya, ozi ọma sitere na China Railway No. 10 Bureau Material Trading Company na China Railway mbụ nnwere onwe mmepụta akara maka elu-ọsọ guardrails e eze tinye n'ọrụ na Jinan.Mgbe anwalechara, ọkpụrụkpụ ngwaahịa, ọdịdị ọdịdị, ihe eji arụ ọrụ na ihe mgbochi corrosion oyi akwa nke nchekwa nchekwa dị elu nke ahịrị mmepụta a na-emezu ihe niile achọrọ nke ọkọlọtọ mba.

A na-akọ na etinyela ahịrị mmepụta ahụ nke ọma ka otu afọ gachara nyocha nke mbụ, nkwenye ọrụ, nyocha ntozu, ịzụrụ akụrụngwa, mgbakọ nọọrọ onwe ya, nbibi akụrụngwa, na ọzụzụ ọrụ.Ọ nwere ike ịmepụta ihe nchebe dị elu nke okpukpu atọ, ogidi, mgbochi mgbochi, nke nwere ikike mmepụta kwa ụbọchị ruo tọn 80, nke bụ ihe dị mkpa maka China Railway No. 10 Bureau Materials Trading Company iji wuo usoro ngwaahịa dị iche iche. ma gbasaa ụdọ ọkọnọ.Mgbe oru ngo a ruru ike mmepụta, ọ ga-egbo mkpa nke dị iche iche dị elu-ọsọ oru ngo ịzụta elu-ọsọ Guardrail ngwaahịa.