M'zaka zaposachedwapa, chitukuko cha makampani opanga PVC chalowa mu mgwirizano wofooka pakati pa kupereka ndi kufunikira. Mzere wa makampani opanga PVC ku China ukhoza kugawidwa m'magawo atatu. 1.2008-2013 Nthawi yokulira mofulumira ya mphamvu zopangira mafakitale. 2.2014-2016 nthawi yochotsera mphamvu zopangira 2014-2016 nthawi yochotsera mphamvu zopangira 3.2017 mpaka nthawi ino yolipira ndalama zopangira, mgwirizano wofooka pakati pa kupereka ndi kufunikira.
