《周书·列传·卷四十九》
自离石以西，安定以东，方圆七八百里，居住于山谷之间，种族部落很多。
自离石以西，安定以东，方七八百里，居山谷间，种落繁炽。
From Lishi to the west and Anding to the east, within a radius of about seventy or eighty miles, they lived in the mountains and valleys, with many races and tribes.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 自离石以西，安定以东，方七八百里，居山谷间，种落繁炽。 [/INST] From Lishi to the west and Anding to the east, within a radius of about seventy or eighty miles, they lived in the mountains and valleys, with many races and tribes.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 自离石以西，安定以东，方七八百里，居山谷间，种落繁炽。
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From Lishi to the west and Anding to the east, within a radius of about seventy or eighty miles, they lived in the mountains and valleys, with many races and tribes.
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