Funny you should say that given you're the one mostly looking at BtcChina and claiming all the other exchanges have to adapt to their low price.
There cannot remain such discrepancies in price. Since btcchina cannot follow price on other exchanger. Chinese and their arbers will arb to take the gift of an insta profit.
Price will level out, with max 5% difference, to the downside on other exchange and upside on btcchina. So around 8-10% less in the coming days on stamp irrespective of coming price fluctuations.
Multinational companies exist.