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Yan Shigu (581–645 CE) was a prominent Confucian classicist and philologist of the Sui and Tang dynasties. His given name was Zhou, but he was universally known by his courtesy name, Shigu.
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Wang Bo (649 or 650–676) was a renowned literary figure of the Tang dynasty. His courtesy name was Zi’an, and he was from Longmen, Jiangzhou (present-day Hejin, Shanxi). At the age of nine, after reading Yan Shigu‘s annotated version of the Book of Han, he composed a ten-volume critique titled Zhi Xia (“Pointing Out…