In this study, we examined China's Young Thousand Talents (YTT) program and evaluated its effectiveness in recruiting elite expatriate scientists and in nurturing the returnee scientists' productivity. We find that YTT scientists are generally of high caliber in research but, as a group, fall below the top category in pre-return productivity. We further find that YTT scientists are associated with a post-return publication gain across journal-quality tiers. However, this gain mainly takes place in last-authored publications and for high-caliber (albeit not top-caliber) recruits and can be explained by YTT scientists' access to greater funding and larger research teams. This paper has policy implications for the mobility of scientific talent, especially as early-career scientists face growing challenges in accessing research funding in the United States and European Union.