Ku China, kuli pafupifupi masauzande masauzande ambiri ogulitsa katundu wothamanga kwambiri, kuphatikiza makampani ogulitsa ndi opanga.Chifukwa chosakhala ndi chidziwitso chobadwa nacho mufakitale, ogulitsa ambiri amakhala ngati makampani ogulitsa omwe ali ndi antchito 1-5, gawo lawo ndi lokwera mpaka 91%, ndipo ali bwino kudziyika okha ngati mafakitale kapena opanga kudzera pa intaneti ndi nsanja zachitatu.Ndi 9% yokha ya opanga omwe angakhale ndi ubwino wamtengo wapatali komanso mphamvu zowongolera khalidwe.Chifukwa chake, kwa makontrakitala ambiri akunja othamanga kwambiri kapena maphwando omanga, ndikofunikira kuti mufufuze mbiri yakampani musanagule, chifukwa zimawapulumutsa mtengo ndi nthawi.

Monga kampani yoyamba ya Expressway guardrail ku China-Malingaliro a kampani Shandong Guanxian Huiquan Transportation Facilities Co., Ltd., apeza zambiri zakutumiza kunja pakutolera zinthu zopangira, ukadaulo wopanga, mtundu wa ogwira ntchito, komanso ntchito zogulitsa pambuyo pake.Sitili ngati makampani ochita malonda, timangochita bizinesi yanthawi yayitali, pomwe amangosokoneza msika, osakhalitsa.

Koma chomwe chikusokonezanso ndichakuti pali makampani ambiri ogulitsa omwe akutuluka, zomwe zimakulitsa zopinga kwa ogula akunja achitetezo othamanga kwambiri kuti awonetse opanga amphamvu zenizeni, kotero pamapeto pake zimabwereranso pachiyambi: cheke chakumbuyo kofunikira. zidzabweretsa phindu kwa ogula.kupulumutsa ndalama zambiri.