Zhū Xī 朱熹 (1130–1200), zì Yuán huì 元晦 / Zhòng huì 仲晦, hào Huì’ān 晦庵 / Kǎo tíng 考亭 / Zǐ yáng 紫陽, posthumously Wén gōng 文公. The supreme synthesizer of Dào xué 道學 Neo-Confucianism, whose fusion of Zhōu Dūn yí, the Chéng brothers, Zhāng Zài, and the Sì shū 四書 (Four Books, selected and elevated by Zhū as the core Confucian curriculum) shaped East Asian philosophy, education, and orthodoxy for the next seven centuries. Chief works include the Sì shū jí zhù 四書集注, the Yì xué qǐ méng 易學啟蒙, and a massive corpus of letters, recorded sayings (yǔ lù 語錄), and edited anthologies. Under the pseudonym Zōu Xīn 鄒訢, he wrote the KR5d0018 Zhōu yì cān tóng qì kǎo yì 周易參同契考異 — a philological-philosophical study of the foundational Daoist alchemical classic — demonstrating the breadth of his scholarly interests into Daoist metaphysics.