《周书·本纪·卷五》
夏季四月乙卯曰，北齐派使者前来吊丧会葬。
夏四月乙卯，齐遣使吊赠会葬。
On Yimao day in the fourth month of summer, envoys from Northern Qi came to offer condolences and attend the funeral.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 夏四月乙卯，齐遣使吊赠会葬。 [/INST] On Yimao day in the fourth month of summer, envoys from Northern Qi came to offer condolences and attend the funeral.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 夏四月乙卯，齐遣使吊赠会葬。
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On Yimao day in the fourth month of summer, envoys from Northern Qi came to offer condolences and attend the funeral.
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