Where the line is for punishable abuse must be a pretty high bar. If Kdrama’s are any indication, and they likely are not, physical punishments and even slaps and stuff don’t even seem to raise an eyebrow.
I know my ex was a Korean woman. A blue day for me meant the kids and I looked black and blue from a pummelling. And you can’t stop them. They get one scratch on their body, they call the cops and say the dad hit the kids and the woman. I was definitely in a no-win scenario.