Are Russians of Mongolian descent?

There must be. Just look at so many marshals in the Soviet Union. It should be said that many Russians are of Mongolian descent.

The expansion of the Mongolian empire to eastern and central Europe will definitely lead to the fusion of lineages. After the establishment of the Russian Principality, the early rulers had to attach themselves to or win over the descendants of the original khanate in order to rule the country. Their local influence should not be underestimated, and many former nobles of Chincha Khanate married Russian women. At the same time, in Russia's later expansion, Tatars (probably mongoloids and eastern Europeans) also made important contributions.

Slavs are more pure, and personally think Ukrainians will be more authentic. Don't need to give an example, just look at the physical characteristics of Ukrainians, not as wide cheekbones and eyebrows as Russians.