Wáng Kāizǔ 王開祖 (ca. 1035–1068), zì Jǐngshān 景山, posthumously Rúzhì xiānsheng 儒志先生, was a Northern Sòng classicist of Yǒngjiā 永嘉 (modern Wēnzhōu 溫州) and a forerunner of the Yǒngjiā xuépài 永嘉學派. Jìnshì of Huángyòu 5 (1053) (per the SKQS tíyào); appointed Mìshūshěng jiàoshūláng with assignment as Adjutant of Lìshuǐ 麗水縣 in Chǔzhōu 處州. He shortly retired to set up a school at Dōngshān 東山 in Wēnzhōu, where he attracted several hundred students and died at thirty-two. The conventional dates 1035–1068 are from Wēnzhōu local-history sources and are consistent with the SKQS tíyào’s “age 32 at death” combined with the 1053 jìnshì. CBDB id 37969 gives 1017–1048, which is internally inconsistent with the 1053 jìnshì and is not followed here. He has no biography in the Sòng shǐ. His lectures, posthumously gathered as the Rú zhì biān 儒志編 (KR3a0022) by Wáng Xún 王循 in Míng Hóngzhì (1488–1505), are the only surviving record of his thought. Sīmǎ Guāng’s Yí Mèngzǐ 疑孟子 — the contemporary anti-Mencian polemic — circulated in his lifetime; Wáng’s stand for the Confucian shèngdào without yielding to the anti-Mencian current is the SKQS’s reason for placing him at the head of pre-Lǐxué Northern-Sòng Confucianism.