Good point, what's preventing a Chinese manufacturer to just generate the "perfect" QR/VIN in this case?
The problem for EU is that EU car companies make a lot of money in China so banning Chinese cars here makes us open for retaliation.
Like, they want rich people to buy new cars and resell them.
Not that poor people buy new 12kUSD cars from the factory since it would tank the economics of buying a new BMW.
Dacia :-)
We are about to enter an age where these things are going to be revised.
But if there is a control and a manufacturer get caught lying about the provenance they are going to have a bad time (or the car manufacturer/battery resellers which didn't do their due diligence).
For instance, Wikipedia says that Russia is the 3rd largest producer of Nickel in the world (and France is 4th through New Caledonia...). This system, and indeed assuming that data are not falsified, allows them to indirectly hit them.
Once the EU has visibility of so many data I'm sure they'll get creative ;)