^ China has been trying to curb their own (threat of a) bubble for the last few years. Just look at the news articles about those crazy cities that are completely empty.
They have been raising downpayment minimums for second houses and even suspended mortgages for third homes on top of raising interest rates. I think they raised down payment minimums to 60% from what I recall (it's been a while.)
Anyhow, given the restrictions I assume they are looking to put their money down where they can - like Vancouver.
EDIT: This is an older article but here ya go:
http://www.bloomberg.com/news/2011-0...ces-climb.html