Which part of my comment related to Thailand? What I stated, and what you responded to asking for evidence, was
The vast majority of manufacturers are selling at a loss on the mainland
That wasn't your point, your point was that prices in China were fair/reasonable. When close to the entire industry is selling at a loss, thats clearly not sustainable.
They could give them away for free and you wouldn't call it dumping, so let's ignore that term entirely since it's a red herring.
Even if it was 'perfectly normal', that doesn't imply that it's a fair market price. It can (and often does) mean below market (not normal) rate in order to capture market share. The company may well not be able to sustain those losses in multiple markets, especially as tariff risks increase if they're too aggressive slashing prices. Even China friendly nations like Brazil are introducing EV tariffs.