《宋书·志·卷三十六》
按淮束从宋武帝永初年间至孝武帝大明年间，便属于南豫州，虽然南豫州和豫州常有分合，而分开的时间居多。
按淮东自永初至于大明，便为南豫，虽乍有离合，而分立居多。
According to Huai Shu from the Yongchu period of Emperor Song Wu to the Damen period of Emperor Xiaowu, it belonged to the Southern Yuzhou. Although the Southern Yuzhou and Yuzhou were often divided and merged, they were mostly separated.
<s>[INST] Provide a modern Chinese interpretation of the following Classical Chinese passage: 按淮东自永初至于大明，便为南豫，虽乍有离合，而分立居多。 [/INST] 按淮束从宋武帝永初年间至孝武帝大明年间，便属于南豫州，虽然南豫州和豫州常有分合，而分开的时间居多。</s>
Provide a modern Chinese interpretation of the following Classical Chinese passage: 按淮东自永初至于大明，便为南豫，虽乍有离合，而分立居多。
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按淮束从宋武帝永初年间至孝武帝大明年间，便属于南豫州，虽然南豫州和豫州常有分合，而分开的时间居多。
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