《旧唐书·列传·卷三十五》
咸亨三年，官名又复旧，张文瓘改授黄门侍郎，兼太子右庶子。
咸亨三年，官名复旧，改授黄门侍郎，兼太子左庶子。
In the third year of Xianheng, the official titles were restored, and Zhang Wenguan was promoted to Huangmen Shilang, and concurrently as the Right Shuzi of the Crown Prince.
<s>[INST] Kindly elucidate the central themes in this passage in English: 咸亨三年，官名复旧，改授黄门侍郎，兼太子左庶子。 [/INST] In the third year of Xianheng, the official titles were restored, and Zhang Wenguan was promoted to Huangmen Shilang, and concurrently as the Right Shuzi of the Crown Prince.</s>
Kindly elucidate the central themes in this passage in English: 咸亨三年，官名复旧，改授黄门侍郎，兼太子左庶子。
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In the third year of Xianheng, the official titles were restored, and Zhang Wenguan was promoted to Huangmen Shilang, and concurrently as the Right Shuzi of the Crown Prince.
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