In Australia, the Trade Practices Act says that there is an expectation that the goods are of "reasonable quality" that they do the purpose they are intended for. A lawyer on a better business site said that even if the warranty has expired (say it is month 13 of a 12 month warranty), you are still covered if say "a wing falls off a plane becasue a blasa spar box fails". Good luck getting this to be enforced for Chinese companies though.

Tim