I believe those fields are where there's high demand but not enough supply. China tech can treat people like shit because there's always someone to replace the

I believe those fields are where there's high demand but not enough supply. China tech can treat people like shit because there's always someone to replace them. I think the stats were more engineers graduate from China come out than the entire history of USA engineers each year. When there's high demand, then any place that systematically treats people like shit would not retain workers and die off. Of course, exceptions exist for places that pay shit tons of money.