The Chinese people went through famines directly caused by the government and due to hi they have the attitude of doing everything they can to earn money and make as much profit as possible and if this means cutting corners they do so.
The Chinese government also imposed production quotas which had to be met so again corners are cut in order to do so, The Russians used to be as bad, there used to be stories of tractor and vehicle factories where in order to keep the quotas up finished products rolled of the production line only to be taken round to the back of the factory where they were dismantled, very similar thing is happening in china today with graveyards of EV's produced because the Chinese government has provided funds to make them but they cannot be sold.
Similar things occurred in non-communist societies.
My brother bought a Holden "One Tonner" ute. (actually, a small flatbed truck).
All was well until the clutch died, & Bro took it in for repair.
The mechanic was a friendly chap & was quite happy for my brother to join him in doing the job.
After the usual stuff, they got the gearbox out & proceeded to unscrew the pressure plate from the fly wheel.
The new "guts" was sitting on the bench, & a comparison revealed that the existing pressure plate/driven plate assembly was smaller, being in fact the one from the sedan.
Digging around, the mechanic found the remains of a cardboard tag attached to one of the clutch cover bolts.
It appears that GMH used the "just in time" parts system, & unfortunately, the "One Tonner" clutches had failed to arrive "just on time".
No worries, just fit a sedan clutch, tag it & when the QA guy saw the tag, it would be taken to one side & the correct clutch fitted------ a polished procedure.
Again unfortunately, this time the tag was inadvertently torn off, except for a tiny piece.
Around the same time, I got into the habit of reading a British auto magazine which had a "blunder of the week section" which called out various hilarious stuff ups by UK carmakers.
One I particularly remember was the one where the upmarket version of a Hillman Imp didn't get the holes drilled for the special badge, so was tagged in the same way as the Holden vehicle above.
The QA guy duly pulled it off to one side where one of his minions drilled the holes & snapped the badge into place, then off it went to the dealer, who had an eager customer "champing at the bit".
That worthy finished the paperwork & drove off in his new "Pride & joy", noticing as he went that the dealer had only put a small amount of fuel in the tank, so rolled into the first petrol station he saw & proceeded to "fill 'er up".
To his consternation, there was petrol everywhere as soon as the fuel level reached the two neatly drilled holes in the tank.
The bloke who drilled the badge holes had used too long a drill bit.