Yè Zhōngkān 葉仲堪, a Sòng-period scholar identified by Marc Kalinowski (in Schipper & Verellen, The Taoist Canon, 2004) as belonging to the circle from which the Yì chart-corpus surviving as DZ 158 (KR5a0159) and circulating in the WYG Sìkù as Dàyì xiàngshù gōushēn tú (KR1a0080) actually derives — against the conventional attribution to 張理 Zhāng Lǐ. Lifedates not securely recorded.