And thinking otherwise is tiresome and delusional. From Nature:
Young Chinese scientists who got their PhDs overseas and returned to China as part of a state-run talent drive published more papers after their return than did their peers who stayed abroad. The productivity bump can be explained by returnees’ access to greater funding and an abundant research workforce, according to the authors of an analysis published in Science1. The findings come as geopolitical competition between the United States and China mounts.