Yáng Shí 楊時 (1053–1135), zì Zhōnglì 中立, hào Guīshān xiānsheng 龜山先生, was a leading second-generation Northern-Sòng daoxué figure, one of the Sì xiānshēng 四先生 (“Four Masters”) of the Chéng-school transmission together with Yóu Zuò 游酢, Xiè Liángzuǒ 謝良佐, and Lǚ Dàlín 呂大臨. Native of Jiānglè 將樂 (Fújiàn). Jìnshì of Xīníng 9 (1076). Held a sequence of provincial posts and rose under Hui-zōng to Mìshūjiān. He is the principal channel by which the Chéng brothers’ teaching transmitted southward to Lǐ Tóng 李侗 (1093–1163) and thence to Zhū Xī 朱熹, making him the proximate ancestor of the Mǐnxué 閩學 tradition. He is the editor and compiler of the ÈrChéng cuìyán 二程粹言 (KR3a0032), the consolidated 1140s recension of the Chéng brothers’ sayings; he is also responsible for the independent transmission of Zhāng Zǎi’s Xīmíng 西銘. Biography: Sòng shǐ j. 428 (Dàoxué zhuàn). CBDB id 2022, dates 1053–1135.