《周书·列传·卷十九》
保定二年，杨忠升任大司空。
保定二年，迁大司空。
In the second year of Baoding, Yang Zhong was promoted to Grand Minister of Works.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 保定二年，迁大司空。 [/INST] In the second year of Baoding, Yang Zhong was promoted to Grand Minister of Works.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 保定二年，迁大司空。
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In the second year of Baoding, Yang Zhong was promoted to Grand Minister of Works.
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