Basically, you've got to reproduce the factors within China making them such strong trading partners outside of them in a way they cannot diminish unilaterally. This could be done with political will or reproduction of their capacity.
Personally, I wonder whether a UBI in a developed country could work to essentially lower their external 'trading costs'. Try to change their thought processes at the margin. i.e. Make the local goods and services out compete the foreign goods/services through moving local costs not observed in foreign goods/services to localized costs. i.e. Maybe a person making a UBI would be willing to do a job for (X+U) - where (X+U) is their reservation price, X is the foreign price, and U the UBI.
Personally, I wonder whether a UBI in a developed country could work to essentially lower their external 'trading costs'. Try to change their thought processes at the margin. i.e. Make the local goods and services out compete the foreign goods/services through moving local costs not observed in foreign goods/services to localized costs. i.e. Maybe a person making a UBI would be willing to do a job for (X+U) - where (X+U) is their reservation price, X is the foreign price, and U the UBI.
Edit-flipped signs