"Don't buy generic electrical goods from East Asia" is pretty good advice in general, given that some people have been literally electrocuted by faulty low-cost equipment sourced from the region.
(Interestingly, a lot of the US–produced products do not pass these tests either. The German standards for product quality are some of the highest existing and they have actually the ability to test all the imported stuff. Just don’t ever trust the TÜV Süd)