Before World War II, long before the Dark Age of political correctness and the rule of the elites, historians often advanced the Aryan hypothesis, that White European tribes, of a warlike barbarian nature, swept into areas such as China and India and conquered the lands, or at least joined the ruling elites: http://www.theoccidentalobserver.net/2017/06/18/western-greatness-and-its-enemies/. Such a view became heretical after the end of World War II.
However, evidence has continued to mount, of White, often red-haired Europeans in China, now preserved as mummies: https://www.forbes.com/sites/kristinakillgrove/2015/07/18/these-red-haired-chinese-mummies-come-from-all-over-eurasia-dna-reveals/#43117b1b3e2c, and now India: http://www.thehindu.com/sci-tech/science/how-genetics-is-settling-the-aryan-migration-debate/article19090301.ece.

