There is truth, however. The Wenzhou house wife property speculator trope has some basis in reality, and Chinese markets are already rife with massive speculation that has seeped into foreign markets popular for Chinese emigration (Toronto, Vancouver, and to a much lesser extent NYC and west cost American cities). You don't have to look hard to see the effects in Vancouver, where condo buildings and housing remain empty due to being seen as speculative assets.
American and some western European housing markets (e.g. UK) are a bit unique in that they haven't limited foreigners from buying and speculating on real estate. Whereas in China, many tier 1 and 2 cities have strict residency requirements before you can buy an apartment (but these also apply to Chinese via their hukou residency system).