This will probably be “good” for China in the long run of 50-100 years down the line but it’s the exact opposite of what humans should be. It’s going to be a disgusting seething horde of Han Chinese, standardized, of common think and purpose, arrogant to everything they have lost. All of this for what? A slightly higher standard of living? Less opposition to the party? What a waste of a beautiful culture and millennia of history.
It may seem whataboutism, but really France does not seems to have got much bad press for turning their linguistically/culturally diverse country into a French speaking monoculture.