Emigrants in the South Area of Northeast Region in Qing Dynasty and the Changes of Environment

In the early years of Qing Dynasty,population in the south area of Northeast Region became rare,soil went out of cultivation and the natural circumstance remain its original state for a long time as a result of the large scale immigration to central plains.Yet,In the wake of the entering of emigrant,the fundamentality alternation happened in northeast south.Formerly in the south of the Liutiaobian,the is that the earth is covered in the Re ho,and then again the west the Yalu River and the Great imperial hunting park.In succession,the pressure on the environment of population is more and more greatter,descendants had to depart from here,looking for the fresh living environment.