https://aeon.co/essays/what-chinese-corner-cutting-reveals-a...
It's quite difficult to make general statements at such a gargantuan scale encompassing every single sector.
China has an abundance of terrific QA in electronics and advanced technologies as much as it has an abundance of the opposite, just simply due to its sheer size.
The US did it when it was a bigger steel supplier, good steel was sold domestically, crappy steel was sold elsewhere. If you got crappy steel in Africa at the time you might have thought US steel was garbage with poor QA, but in reality US steel was great and they just shipped the crappy stuff because people still kept buying it.
My endlessly excellent Chinese gear (Dahua cameras, XikeStor switches, etc) doesn't know what you're referring to.