《衍约说》及《五色线》两种笔记,旧题皆为宋人佚名者所撰.今存《衍约说》更为今人书目著录为宋本.然而,《衍约说》的成书及刊刻年代应该在元初而并非宋代.今存明本《五色线》的章次编排、体例也已非宋本之旧.%The inscription of two notebooks—Yanyueshuo and Wusexian were written anonymously in Song Dynasty. Yanyueshuo was labeled as Song's block-printed edition. However, the completion time of Yanyueshuo should be completed in early Yuan Dynasty rather than in Song Dynasty. The chapter compilation and style of Ming edition Wusexian are different from the Song edition.
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