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.
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…