Their world leading battery tech is much cheaper and last longer, as they bet on the right tech compared to basically every western car company. Their cars overall are much cheaper for equivalent or better quality. Their car companies are desperate to stand out given there are over 100 of them so produce wide ranges of extra features and designs.
But the battery is commodity technology, not a moat. There's not much stopping every other manufacturer from adopting the same thing.
And of course they are cheaper, they are selling in a market with much lower price capacity. They would not be nearly so cheap if they sold in the market like the US, so it is not sensible to compare prices as if they would.