辽海一词,最早出处见于《后汉书》。其本义是辽河与渤海的合称。作为人文地理名称,它所指代的地望,并不是前人所说的东北全境,而是秦汉之际中原王朝在东北地区所能掌控的地域范围,大体上包括今天河北省的承德市、内蒙古的赤峰市、辽宁省全境和朝鲜半岛北部一带。这一区域,在中华原生型国家文明的起源与续生型国家文明的发展过程中,具有举足轻重的历史地位。
One of the earliest source of Liaohai words is in Book of Later Han.Its original meaning is referred to as Liaohe and the Bohai sea.As the name of the humanity geography,it refers to generation of region,not the previous said throughout the northeast.In the Qin and Han Dynasty period,the Central Plains Dynasties can control the geographical scope of the northeast,generally including today's Chengde City,Hebei Province,Chifeng City in Inner Mongolia,the whole territory of Liaoning Province and the northern Korean peninsula.This area has an important historical position in the development process of the origin of civilization of the Chinese native countries and continued growing national civilization.