后金时期，努尔哈赤和皇太极父子为弱化来自明朝海上势力的威胁，采取了迁海措施，稳定了后金政权在河东地区的统治，为清王朝入关统一全国奠定了基础，也开了清初迁海之滥觞。而皇太极时期在沿海地带的有限展界和军事布防，也为顺康两朝预先完成了对东北地区黄海沿岸的迁海，奠定了清前期东北行政区域与民族分布的格局。

 Nurhachi and Huangtaiji enacted the coastal evacuation measures to diminish the threatof Ming sea power. At the same time，the evacuation stabilized their rule in the area east of the Liao River. This laid the foundation for national unification and pioneered the Coastal Evacuation of the early Qing dynasty.This maritime policy and the preventive measures of the Huang Taiji period determined the administrative areas and ethnic distribution patterns in the northeast area.