That's the beauty of science, everyone gets the same results. Scientists can work together no matter where they came from, because they share the language of science: The scientific method.
I had never even considered that China might actually succeed in reversing the brain drain phenomenon. I had already intuitively understood that it had stopped it, but to start attracting scientists from Japan of all places, that is a serious feat.
Material conditions are what matters in the end. As the west and its puppets continue to decline economically, people who have options will increasingly look for greener pastures.