What if one group of Chinese migrate enmasse to OTL Kalmykia and establish a Kingdom during the Mongol times and create a Kingdom after the Mongols are defeated, and this Kingdom expands to Crimea.
Maybe a Mongol ruler who is a complete Sinophile decides that he needs more Chinese people over in European Russia to help "civilize" various areas. Initially artisans and officials are selected to help govern, but later on larger immigration via the Silk Road occurs (maybe a famine occurs in China proper or something?) that establishes a viable populace. This Sino-Mongolian kingdom solidifies and becomes fully independent when the greater Mongol empire collapses. It affects significant cultural influence upon the nearby Russian state(s), which it eventually conquers or is conquered by.
Maybe a Mongol ruler who is a complete Sinophile decides that he needs more Chinese people over in European Russia to help "civilize" various areas. Initially artisans and officials are selected to help govern, but later on larger immigration via the Silk Road occurs (maybe a famine occurs in China proper or something?) that establishes a viable populace. This Sino-Mongolian kingdom solidifies and becomes fully independent when the greater Mongol empire collapses. It affects significant cultural influence upon the nearby Russian state(s), which it eventually conquers or is conquered by.
How would be its relationship with the Christian Countries in the East and Western Europe?