Zhōu Gōng 周公
The Duke of Zhōu, personal name Jī Dàn 姬旦. Younger brother of King Wǔ 武王 of Zhōu 周 and uncle of King Chéng 成王, for whom he served as regent during the consolidation of the Zhōu dynasty. Canonical exemplar of the loyal regent and culture-hero of Zhōu ritual and institutional order — the Zhōuguān 周官 / Zhōulǐ 周禮 ritual system is traditionally ascribed to him. In the standard Yì attribution (already implicit in Xìcí xià 繫辭下) he is credited with composing the line statements (yáocí 爻辭) of the Zhōuyì, completing the work begun by his father 周文王 King Wén; the attribution is not sustainable on internal evidence. Lùn yǔ-style ritual sayings and admonitory addresses to the young King Chéng are recorded in the Shàngshū 尚書 (Wú yì 無逸, Lì zhèng 立政, etc.).