中国核心其实就一小块地方,周边都是山区,荒漠,丛林,对于古代的社会太难扩展了,也就形成了自然的疆域。稍微有点阻隔的,比如朝鲜,越南,就一直延续到现在。
中国核心其实就一小块地方,周边都是山区,荒漠,丛林,对于古代的社会太难扩展了,也就形成了自然的疆域。稍微有点阻隔的,比如朝鲜,越南,就一直延续到现在。
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