IOW, they're not dumping, they're doing the opposite. I don't know why.
If they're doing the opposite yet end up a lot cheaper with higher quality and more features, I'm really not sure what's going on. Don't see how they could be cheaper either.
1. Competition in China is fierce, there are over 100 car companies. A large fraction of them are losing money. BYD et al are lowering prices to drive their competitors in China bankrupt. They've got higher prices outside of China to enable this behaviour.
2. They're quite sensitive to the dumping charges, so bend over backwards to ensure they aren't.