Pa Novembara 13, 2018, dipatimenti ya Zamalonda ku US (DOC) idapereka chigamulo choyambirira chotsutsana ndi kutaya pama countertops a quartz omwe adatumizidwa kuchokera ku China.

Chigamulo choyambirira:
Mphepete mwa kutayira kwa Foshan Yixin Stone Co. Ltd. (Xinyixin Co. Ltd.) ndi 341.29%, ndipo kusungitsa kwakanthawi koletsa kutaya pambuyo pochotsa msonkho wotsutsana ndi 314.10%.
Malire otayira a CQ International Limited (Meiyang Stone) ndi 242.10%, ndipo kusungitsa kwakanthawi koletsa kutaya ndi 242.10%.
Mphepete mwa kutayira kwa Guangzhou Hercules Quartz Stone Co., Ltd. (Haiglis) ndi 289.62%, ndipo kusungitsa kwakanthawi koletsa kutaya ndi 262.43% pambuyo pochotsa ntchito yotsutsa.
Malire otayira a ena opanga / ogulitsa ku China omwe ali ndi misonkho yosiyana ndi 290.86%, ndipo kusungitsa kwakanthawi koletsa kutaya ndi 263.67% atachotsa msonkho wotsutsana.
Malire otayira a opanga / ogulitsa aku China omwe salandira msonkho wosiyana ndi 341.29%, ndipo kusungitsa kwakanthawi koletsa kutaya pambuyo pochotsa msonkho wotsutsana ndi 314.10%.
Malinga ndi kuwunika koyambirira, chifukwa chomwe DOC idagamula misonkho yayikulu pachigamulo choyambirira cha mlanduwu ndikuti Mexico idasankhidwa kukhala dziko lina.Ku Mexico, mitengo ina monga mchenga wa quartz (zida zopangira zinthu zomwe zikukhudzidwa) ndi yokwera kwambiri.Mawerengedwe enieni otayira amafunika kuunikanso.
Pachigamulo choyambirira chotaya, DOC idazindikira kuti makampani onse ali ndi "boma ladzidzidzi", motero adzaika chiwongola dzanja choletsa kutaya zinthu zomwe zidatumizidwa masiku 90 isanayimitsidwe chilolezo cha kasitomu.Dipatimenti ya Zamalonda ku US ikuyembekezeka kupereka chigamulo chomaliza choletsa kutaya pamilandu iyi kumayambiriro kwa Epulo 2019.
Pachifukwa ichi, China Min metals Chamber of Commerce, Unduna wa Zamalonda ndi China Stone Association ali okonzeka kukhazikitsa nthawi yomweyo chitetezo chosawononga cha quartz yokumba ku United States.Zimamveka kuti malinga ngati pempho losavulaza likhoza kutsimikizira chimodzi mwa mfundo zitatuzi, zigamulo zoyamba zomwe zilipo kale zathetsedwa: choyamba, zinthu zaku China zilibe vuto kwa mabizinesi aku America;chachiwiri, mabizinesi aku China sataya;chachitatu, palibe mgwirizano wofunikira pakati pa kutaya ndi kuvulaza.
Malinga ndi anthu odziwa bwino vutoli, ngakhale kuti panopa ndizovuta, komabe pali mwayi.Ndipo ogulitsa aku America akugwira ntchito molimbika ndi makampani amiyala aku China kuti apirire.
Malinga ndi malipoti, mtengo wonse wa chitetezo chosawononga ku quartz yochita kupanga ku United States ndi pafupifupi 250,000 US dollars (RMB 1.8 miliyoni), zomwe ziyenera kugawidwa ndi makampani a miyala.Fujian ndi Guangzhou ndi mabungwe akuluakulu, omwe amatsatira mfundo za bungwe lodzifunira.Pakati pawo, Fujian akuyembekeza kukonza pafupifupi 1 miliyoni yuan.Tikukhulupirira kuti mabizinesi akuchigawo cha Fujian atenga nawo gawo mwachangu.