《宋史·本纪·卷二十一》
六月初一，因明堂修成，进封蔡京为陈、鲁两国公。
六月戊午朔，以明堂成，进封蔡京为陈、鲁国公。
On the first day of June, because the Hall of Brightness was completed, Cai Jing was enfeoffed as the Duke of Chen and Lu.
<s>[INST] Rewrite the following English passage in the style of Classical Chinese: On the first day of June, because the Hall of Brightness was completed, Cai Jing was enfeoffed as the Duke of Chen and Lu. [/INST] 六月戊午朔，以明堂成，进封蔡京为陈、鲁国公。</s>
Rewrite the following English passage in the style of Classical Chinese: On the first day of June, because the Hall of Brightness was completed, Cai Jing was enfeoffed as the Duke of Chen and Lu.
user
六月戊午朔，以明堂成，进封蔡京为陈、鲁国公。
assistant