As Korean, yes there’s plenty of racism of Asians vs Asians. My aunts in Korea were terrified of Chinese people when they were kids because there were always rumors of them kidnapping kids etc.

There’s a lot of anger across Asia for Mainland Chinese these days. Practically all countries look down on Mainland Chinese, even those in Hong Kong does too. They think Mainland Chinese are dirty and loud and obnoxious because as tourists they are very obnoxious.

Koreans have general hate towards Japanese because of the war, but prefer Japanese to Chinese and all other Asians are looked down on, like Vietnamese, Philippines, etc.