What group of people ruled china before 1368

Kublai Khan (Ruled 1260–1294) Kublai was a grandson of Genghis Khan. He had a comparatively long rule and reformed the empire to increase his power and make the empire prosper.

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.

the group i'm selecting: greeks.

a first group of greek immigrants came to the us in the 1850s. the second group came to america starting in the 1890s due to economic opportunities they didn't have back in their home caused by the hardships of ottoman rule. greek immigration was 90% male, many of them expected to work and return to greece after earning enough capital, but ultimately had to remain in the us after the greek genocide.