Shouldn’t make much of a difference to the outside world. The chinese economy is heavily export led. A crash in domestic consumption would probably just lower costs for chinese manufacturers and make chinese exports cheaper. I could be wrong of course, and await enlightenment.
ETA: One possibility could be that they stop lending to the developed world at cheap rates, and that could have fairly massive negative consequences
It certainly isn’t a sudden, surprising shock the way that the credit crunch was to many economists and investors. China’s property market has been known to be propped up by cheap lending and government initiatives for some years now. There are even huge new towns almost entirely unoccupied…which seems rather strange in a country with 1.3 billion people.
Haven’t heard anyone panicking about this yet.
It may actually be a help to the rest of the World, WRT commodities prices which are (IMO) artificially high in a world with little to no growth. As to its exports, China still has a current account surplus of 4% and $3.2 trillion in exchange reserves but exports have gone down to around 30% of GDP with its internal market taking up the slack.
All in all, this could be good news for the economy if the reduction in prices in China is small and just a naturally occurring retracement rather than a full-blown crash. Many areas on the east coast are already too expensive for young people to buy which does not bode well for the long-term health of any property market.