Microcosmic orbit — sacral gate approach (textual)
Circuit anchor
Microcosmic orbit — sacral gate approach (textual) — anchor of the orbit circuit projection (nèidān textual course; Kohn as modern reference).
Point 10 of 46 in Macrocosmic Orbit (dà zhōu tiān 大周天)
Cross-tradition overlaps
Sources
Tàishàng huángtíng wàijǐng jīng and later nèidān corpus (Tang–Song) (primary_canonical)
Nèidān textual tradition describing the circulation of qì through the Ren–Du circuit (xiǎo zhōu tiān) and its extension through the whole body (dà zhōu tiān).
Wang Zhe / transmitted Daoist internal-alchemy corpus; cf. Livia Kohn, The Taoist Experience (secondary)
Modern scholarly reference for the small and great heavenly circuit practices.