《宋书·志·卷二十五》
乙卯，水星犯轩辕。
乙卯，辰星犯轩辕。
Yimao Year, Mercury encroached on Xuanyuan.
<s>[INST] Kindly elucidate the central themes in this passage in English: 乙卯，辰星犯轩辕。 [/INST] Yimao Year, Mercury encroached on Xuanyuan.</s>
Kindly elucidate the central themes in this passage in English: 乙卯，辰星犯轩辕。
user
Yimao Year, Mercury encroached on Xuanyuan.
assistant