Chéng Zhì 程智 (1602–1651), late-Míng / early-Qīng Yìjīng speculative theorist. His doctrine that the Xìcí’s Dì chū hū Zhèn 帝出乎震 preserves the substance of the lost Xià-dynasty Lián shān 連山 and Kūn yǐ zàng zhī 坤以藏之 preserves the substance of the Yīn-dynasty Guī cáng 歸藏 was adopted in 趙繼序 Zhào Jìxù’s KR1a0161 and rejected by the Sìkù editors as forced.