Nico Coesel expounded in :

...
The most interesting fact is that everything is made in
China these days. That Yamaha generator is also made in
China but Yamaha is probably on top of quality control. The
same generators are probably sold under many different
brands with lesser components.

My wife bought me a golf shirt on sale shortly after I got my
gieger counter from eBay (a couple of years ago). For kicks I
measured it and found that it registered on avg a bit higher
than the background levels around our place.

Many washes later, it has returned to background levels.

The level was not high enough to worry about, but was one of
those things that make you go hmmmm... I think the shirt was
made in Korea.

Warren