I read a couple of years ago that there is a culture of cutting corners to save money in China and they were not above using poor sub standard parts and ingredients, even when they knew that the results could be disastrous.
Probably related to the culture of it being extremely impolite to say “no” to any request.
“Can you deliver dog treats for less than this cost?”
“Yes”... ALWAYS “Yes”
Someone said it was extremely frustrating when asking any manufacturers over there if they could deliver product by any given deadline. They’d always say “yes” and then not deliver. It was more culturally acceptable to fail on what you agree to than to say you can’t do it when asked.