《宋史·本纪·卷十一》
二十四日，元昊自名晨霄，派人来降服纳款，称夏国。
癸巳，元昊自名曩霄，遣人来纳款，称夏国。
On the 24th, Yuan Hao named himself Chen Xiao, sent someone to submit and pay tribute, and called himself the State of Xia.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 癸巳，元昊自名曩霄，遣人来纳款，称夏国。 [/INST] On the 24th, Yuan Hao named himself Chen Xiao, sent someone to submit and pay tribute, and called himself the State of Xia.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 癸巳，元昊自名曩霄，遣人来纳款，称夏国。
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On the 24th, Yuan Hao named himself Chen Xiao, sent someone to submit and pay tribute, and called himself the State of Xia.
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