>>509523421
Genetic bombs are a meme.
They're too prone to mutation which makes them nearly guaranteed to backfire eventually no matter how well they're designed.

>Han Chinese ethnic bomb
This in itself is prime reason why it will fail. Han is not one ethnic group, it's a cultural one.
China has more diversity than Europe, and is only less diverse than Africa, even if they all rook same.
Modern Chinese are incredibly mixed and diverse genetically speaking.
Only half of them have epicanthic folds, and a significant portion of them don't even tan. That should tell you more than enough.