That’s not very materialist of you. If Chinese money helped rebuild an entire town and got people back in homes, those people would absolutely love the Chinese government forever.
The narrative might be that the shady yellow man is manipulating the masses, but it would fall flat against the material power of actually helping the masses.
Which is why they’ll never allow this to happen. The propaganda only works of you deny the aid.
Fascist propaganda beats material aid through genocide and violence. They win by preventing improvements to material conditions and blaming the suffering that follows on racial subgroups or the very communists they prevented from providing aid.