> In Vancouver, a western property market generally considered as overheated and overpriced, the house price to income ratio is 7.8
> In China's major cities, the price-to-income-ratio is around 40 or 50.
None of these are applicable: In any megapolis that people flock to, property prices skyrocket. This is not something unnatural or artificial. It would be inflated, yes, but it wouldnt be like what the US banking and investment sector did with subprime mortgages. It was an outright scam, and the real scam was not in the subprime lending - it was in the derivatives that were created based on those shaky assets.
There is no such situation in either China, in San Francisco, in Tokyo or any such place. People are cramming into various cities and regions, and causing prices to skyrocket.
> These are figures considered inconceiveable in Western countries
Of course. One 'tier 3' city in China is 10 million people. In the US, that would be a megapolis. In China its just tier 3. The scale is too different.