BYD pulled off the same thing in EU as well, in Hungary [0].

The dark factory part is simply propaganda, the viral WSJ interview is only about body assembly which is already automated everywhere. The labor intensive part is the general assembly and even they admit this in the video. However here it's like Chinese EV found the silver bullet in car manufacturing.

[0]: https://chinalaborwatch.org/building-byd-szeged-labor-risks-...