《旧唐书·本纪·卷十三》
二十一日，以虔州刺史赵昌为安南都护、经略招讨使。
庚辰，以虔州刺史赵昌为安南都护、经略招讨使。
On the 21st day, Zhao Chang, the Historian of Qian Prefecture, was made the Capital Protector of Annan and the Inspector-General for the Plan for Conscription.
<s>[INST] First, translate the Classical Chinese text into modern Chinese and then into English. Classical Chinese: 庚辰，以虔州刺史赵昌为安南都护、经略招讨使。 [/INST] 二十一日，以虔州刺史赵昌为安南都护、经略招讨使。 Then, On the 21st day, Zhao Chang, the Historian of Qian Prefecture, was made the Capital Protector of Annan and the Inspector-General for the Plan for Conscription.</s>
First, translate the Classical Chinese text into modern Chinese and then into English. Classical Chinese: 庚辰，以虔州刺史赵昌为安南都护、经略招讨使。
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二十一日，以虔州刺史赵昌为安南都护、经略招讨使。 Then, On the 21st day, Zhao Chang, the Historian of Qian Prefecture, was made the Capital Protector of Annan and the Inspector-General for the Plan for Conscription.
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