Perhaps we shouldn't generalize as the quality of output of an
entire country? There is crap made in every country, that's just reality.
For today's humour content you can see a backwards Chinese spark plug factory here:
Thread: A visit inside a state of the art spark plug factory in China at News Forum (ThreadID: 1063782)
I have no idea if this is a joke or not, but my guess is they are knock-offs of some sort....