When Russian tsarists immigrated to a vast area occupying 6,543,800+million territory in the northeast of China, did the local China residents return to China?

Mongolia became independent. Will anyone come back? Is there a record? Probably it can be from the left bank of Heilongjiang in the Love Faint Treaty, from the south of Gyeonggi Province to Hormuljintun, so that the Manchu people who used to live in it will still live in their own villages forever, and will still be managed by Manchu ministers and officials, and they will be reconciled with the Russians and will not be violated. Second, the two peoples live in peace. Wusuli, Heilongjiang and Songhua River are inhabited by people belonging to the two countries, who make them trade together. Officials and others on both sides of the Taiwan Strait take care of each other's trade. "See.