The Hou Qi room in 《Xu Han Shu-Lu Li Zhi》and the sound insulation from the urn wall records by Fang Yizhi embody sound insulation technology of the ancient China.

《续汉书·律历志》中的“候气之室”是中国古代高级隔音室，方以智记载的“瓮墙”隔声能满足日常生活的隔声需要，这表明中国古代的隔声技术已达到很高的水平。

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It was the struggle between the Han nationality scholar and the sycophant clique and the clique of Xungui that make the Eastern Wei and Northern Qi dynasty to decline rapidly.

第四部分讨论汉族士人与恩幸集团在东魏、北齐的状况以及他们和勋贵集团的斗争。

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Even if we win the battle, we must guard the land of Qi by passing through the kingdoms of Han and Wei.

即使打胜了，也必须越过韩、魏两国才能到达，很难守住。

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