Vast amount of Alberta oil will continue to flow across Canada and to the U.S. But growth in the U.S. will slow dramatically, so the issue is growth as well as low prices. 
China has its sources of oil imports - Iran, Saudi and Russia today; Russian import to China will grow dramatically. China worry is not supply or price, but the insecurity of half of its import. Oil trade routes from Saudi and Iran will be blockade by the U.S. at the first sign of trouble. Likewise import from Canada. No Chinese government will subject themselves to easy American blackmail, which is certain to come. 
Alberta most promising Pacific oil export is Japan and should work on that as top priority. 
But Alberta has other good stuff to export - the world finest beef. China can gobble up all that it can produce once things are worked out. Other top earner is tourism from China. It should custom make all kinds of goodies for Chinese, just as it did for Japanese.