《后汉书·列传·南匈奴列传》
单于长在位二十三年去世，单于汗的儿子宣继位。
单于长立二十三年薨，单于汗之子宣立。
The Chanyu had been in power for twenty-three years when he died. His son, Chanyu Han, succeeded him to the throne.
<s>[INST] Convert the following English text into Classical Chinese: The Chanyu had been in power for twenty-three years when he died. His son, Chanyu Han, succeeded him to the throne. [/INST] 单于长立二十三年薨，单于汗之子宣立。</s>
Convert the following English text into Classical Chinese: The Chanyu had been in power for twenty-three years when he died. His son, Chanyu Han, succeeded him to the throne.
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单于长立二十三年薨，单于汗之子宣立。
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