Yuanmou people from 21 BC, is China's long period of primitive society .

从元谋人到公元前21世纪，是中国漫长的原始社会时期。

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Yuanmou people from 21 BC, is China's long period of primitive society .

从元谋人到公元前21世纪，是中国漫长的原始社会时期。

youdao