The period from the Qin to the early Eastern Han dynasty saw a transition in Chinese agricultural production from farming with hoes and spades into farming with ploughs.
秦至东汉中期，我国农业生产仍处于由锄、锸耕向犁耕过渡时期。
Xiongnu who did exist in North China from the latter Warring States period to the early Eastern Han Dynasty, had caused great threat to the authority of the Han Dynasty in the central plain.
匈奴从战国末期一直到东汉前期三百年间活跃于中国的北方，对中原汉王朝造成了极大的威胁。
Burials of Han Dynasty discovered in this area, can be divided into four stages which last from early Western Han Dynasty to early Eastern Han.
这一地区已发现的汉代墓葬可以分为四期，从西汉早期延续到东汉早期。
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