Qingdao Sainuo Group tau tsim nyob rau xyoo 2005, yog kev tsim khoom, kev tshawb fawb tshawb fawb, kev siv, kev muag khoom raws li ib qho ntawm cov tuam txhab ua haujlwm siab.30,000 tons ntau lawm, 60,000 tons ntau lawm thiab muag muaj peev xwm.Peb lub tuam txhab muaj ntau tshaj 100 tus neeg ua haujlwm, 4 factories, cov khoom muaj xws li ...
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