《辽史·本纪·卷十》
二十五日，圣宗即位于景宗灵柩前，时年十二岁。
癸丑，即皇帝位于柩前，时年十二。
On the 25th day, Shengzong succeeded to the throne before the coffin of Jingzong, who was 12 years old at that time.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 癸丑，即皇帝位于柩前，时年十二。 [/INST] On the 25th day, Shengzong succeeded to the throne before the coffin of Jingzong, who was 12 years old at that time.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 癸丑，即皇帝位于柩前，时年十二。
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On the 25th day, Shengzong succeeded to the throne before the coffin of Jingzong, who was 12 years old at that time.
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