Longgang is a big family, and the capital of each company is hundreds of millions. The factory rent is about 30 thousand per year, plus the freight yard is about 50 thousand-60 thousand per year That is, the rents in Area C and Area AB of Factory Steel are relatively high. The rear steel plates are all replaced together. It is impossible to replace one piece separately, but several layers of steel plates are replaced together. General repair shop replacement price is 900- 1400.