《晋书·帝纪·第六章》
甲午，封皇子司马昱为琅王牙王。
甲午，封皇子昱为琅邪王。
On Ji午, the crown prince Sima Yu was granted the titles of Prince of Lang and Prince of Ya.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 甲午，封皇子昱为琅邪王。 [/INST] On Ji午, the crown prince Sima Yu was granted the titles of Prince of Lang and Prince of Ya.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 甲午，封皇子昱为琅邪王。
user
On Ji午, the crown prince Sima Yu was granted the titles of Prince of Lang and Prince of Ya.
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