《资治通鉴·晋纪·晋纪二十三》
哀帝想为太妃居丧三年，仆射江陈述说： 根据礼制，应该服三个月的缌麻丧。 
帝欲为太妃服三年，仆射江虨启： 于礼，应服缌麻。 
Emperor Ai wanted to observe three years for the late Empress Dowager, but the Minister of the Armed Forces Jiang Chen said: According to the ritual law, you should be observing three months in coarse cloth for the late Empress. 
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 帝欲为太妃服三年，仆射江虨启： 于礼，应服缌麻。  [/INST] Emperor Ai wanted to observe three years for the late Empress Dowager, but the Minister of the Armed Forces Jiang Chen said: According to the ritual law, you should be observing three months in coarse cloth for the late Empress. </s>
Identify the key themes in this Classical Chinese text and explain them in English: 帝欲为太妃服三年，仆射江虨启： 于礼，应服缌麻。
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Emperor Ai wanted to observe three years for the late Empress Dowager, but the Minister of the Armed Forces Jiang Chen said: According to the ritual law, you should be observing three months in coarse cloth for the late Empress.
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