Abstract:The paper explores the earliest settlements of the four tribes (Yehe, Wula, Huifa, Hada) of the Hulun confederation of Haixi Jurchen and explains their important strategical role for the Jurchen unification. Through comparative analysis of the natural environment, social relations, and urban defense structures, the paper demonstrates the gradual establishment of a military defense system and urban morphology that highlights Jurchen thought and practice in urban defense planning and management from the mid- to the late-Ming dynasty.