Young adult!China/child!Russia - Comfort in an unfamiliar place

[asiandex]

The Mongols have recently invaded the lands of modern day Russia, claiming the territory as part of their empire. A very young (preferably appearance wise as 6 years old) Russia is taken to live in Mongolia's house and is very scared. Mongolia obviously wants nothing to do with raising children, so he leaves the little nation in the care of another resident of his house: China.
First time meeting, comfort, and little Russia being taken care of please!

Bonus 1- child!Russia is referred to as Muscovy.
Bonus 2- little Japan and Korea make an appearance as well.

Request Link: here
Fill: Crawling Before We Walk
Status: incomplete