Help convincing sister not to miscegenate

Topic Suggestion/Request:
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I need help convincing my sister not to miscegenate

Reasoning:
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Recently my sister has started dating a chinese guy. I explained to her why I view race-mixing as destructive/that we should try to preserve God’s design, I told her her kids wouldn’t look like her, that her kids would be very short, as well as some other more personal criticisms but she didn’t care about any of it. However I don’t think it’s because she is totally against being convinced.

I had previously managed to convince her not to date a black guy by making her realize how lazy and unambitious they are. She asked me what I thought about her chinese boyfriend, and when nothing I said landed, she said something along the lines of “I thought you were going to point out some major cultural issue with the chinese like you did about black people.”

My problem is I really know nothing of the chinese at all, and have next to zero experience with them. From seeing you speak about various people/cultures in the past you seem to be very knowledgeable, so I hoped maybe you could provide some kind of insight and maybe some suggestions for angles I could take in convincing her.