the earlier mongol and later manchu subjugation of china actually changed chinese civilization. kublai khan had a mongol court and instituted mongol governance with each chinese family raising feed and a horse to support a mongol cavalry trooper. the claim that chinese officials filled kublai’s court is vacuous as only capable chink traitors were allowed to provide advice at the lower rungs of government not govern. positions of power were still being held by mongols. kublai and subsequent rulers hired turk, kazakh, and persian advisers from central asia to fill his court. china was run like a mongol camp, and the cuntry was opened for visitors and merchants from all over central asia and europe. chinks were 2nd crass shitizens, in fact treated like slaves. and hostages.As a matter of fact, chinese scholar has study the migration waves of Northen Chinese flooding into Southern China since Qin Dynasty, that defeat the earliest Yue Kindgom in Canton, the Qin General Setup a new Kindgin call Nan Yue in early Han - this mark the 1st wave of mass migration
2nd wave migration is trigger in Late Han to Sui Periodas Northern Nomadic Tribes gain control of Northern China sovereignty- 五胡乱华. After that there are few more waves of mass migration into Canton and Fujian in sub sequent dynasties. That is the reason why there are so many dialects in Canton and Fujian