《北史·列传·卷八十二》
光武帝建武八年，高句丽派使者入朝进贡。
光武建武八年，高句丽遣使朝贡。
In the eighth year of Emperor Guangwu's Jianwu era, Goguryeo sent envoys to pay tribute.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 光武建武八年，高句丽遣使朝贡。 [/INST] In the eighth year of Emperor Guangwu's Jianwu era, Goguryeo sent envoys to pay tribute.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 光武建武八年，高句丽遣使朝贡。
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In the eighth year of Emperor Guangwu's Jianwu era, Goguryeo sent envoys to pay tribute.
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