Ndi mathamangitsidwe a ndondomeko ya mafakitale, ntchito mavavu Chinese mu uinjiniya ndi mokulirapo, ndipo mtundu wake ndi chiwerengero zikuchulukirachulukira. Kusankhidwa kwa ma valve a ku China kumakhudza mwachindunji chitetezo, kukhazikika ndi kuyendetsa bwino kwa zipangizo zamakampani, choncho, momwe mungagulire ma valve achi China okhala ndi khalidwe labwino komanso ntchito yokhazikika yakhala vuto lalikulu kwa ogwiritsa ntchito ambiri. Nkhaniyi ifotokoza za zovuta zomwe zimachitika pakugula ma valve ku China mozama, ndikupereka mayankho, kuyembekezera kupereka zolozera ndi thandizo kwa ogula mavavu aku China.