The Chinese American experience:
25 years ago: "You are the weak man of Asia LMAO USA USA USA"
Today: OMG, you are about to overtake us and create a new world
2000-2018 were the twilight years for Asian Americans. More asians would come to the US and asian stores/restaurants florished in many community.
China should set up a special administration buisness/invention zone for returning people of Chinese or Asian heritage. The reality is that many of them will have broken Chinese and would need a generation to integrate back in (and to drop any western poltical ideals). Toss them in one of the "ghost cities" and see how it works out. Do it like the McBNO, must have x minimum in assets etc.
I think this plan may slow the birthrate decline and also bring in capital.