《金史·本纪·卷五》
三月十九日，命令翰林学士刘长言等人作为生日使赴宋国。
三月庚寅，以翰林学士刘长言等为宋生日使。
On March 19th, Imperial Academy scholars Liu Changyan and others were ordered to go to the Song State as birthday envoys.
<s>[INST] Kindly elucidate the central themes in this passage in English: 三月庚寅，以翰林学士刘长言等为宋生日使。 [/INST] On March 19th, Imperial Academy scholars Liu Changyan and others were ordered to go to the Song State as birthday envoys.</s>
Kindly elucidate the central themes in this passage in English: 三月庚寅，以翰林学士刘长言等为宋生日使。
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On March 19th, Imperial Academy scholars Liu Changyan and others were ordered to go to the Song State as birthday envoys.
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