The entire bit about China is worth your time, but the part that grabbed my attention is at the 7:55 mark with the map that details the demographic flows outward to other East Asian countries. This is China's talent export strategy. You want an economic link with a city? Send your best and brightest there.
As far as I know, China is the only place that funnels brain drain for purposes of economic development and geopolitical gain. India seems intrigued with this approach and now sees its talent as a trade asset. The labor mobility pact between India and Denmark is a good example. Denmark is aging and desperate for immigration. I'd like to know how India plans to cash in on such arrangements. Denmark strikes me more as a willing partner than a particularly advantageous one.