I nā makahiki i hala iho nei, ua komo ka hoʻomohala ʻana o ka ʻoihana PVC i kahi kaulike nāwaliwali ma waena o ka lako a me ka noi. Hiki ke hoʻokaʻawale ʻia ka pōʻai ʻoihana PVC o Kina i ʻekolu mau pae. 1.2008-2013 Kiʻekiʻe-wikiwiki ulu manawa o ka 'oihana hana mana. 2.2014-2016 hana mana withdrawal period2014-2016 hana mana withdrawal manawa 3.2017 a hiki i kēia manawa hana koena manawa, nāwaliwali koena ma waena o ka lako a me ka koi.
