《北史·本记·卷十一》
十一日，祭祀时皇帝十分感伤。
壬子，祀感帝。
On the 11th, the emperor was very emotional during the offering ceremony.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 壬子，祀感帝。 [/INST] On the 11th, the emperor was very emotional during the offering ceremony.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 壬子，祀感帝。
user
On the 11th, the emperor was very emotional during the offering ceremony.
assistant