Yan studied in this paper from the Western Zhou Dynasty culture refers to before the Qin unification, by living in the State of Yan Yan who created the archaeological and cultural relics.
本文所研究的燕文化是指从西周初年到秦统一之前，由生活于燕国的燕人所创造的考古学文化遗存。
In 221 BC, the Qin Dynasty (221-206 BC) realized the first unification in history of China, and established prefectures and counties to rule the country.
公元前221年，秦朝实现了中国历史上第一次大一统，在全国设郡县加以统治。
From the unification of China under the Qin Dynasty till the Han Dynasty, jade sculptures remained almost the same.
至周代，各地区玉器型制差异减少，秦统一至汉代，各类玉雕几乎都已大同。
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