Mìngmén — lumbar gate reference
Back-body checkpoint projected front
Mìngmén is a posterior lumbar reference projected just beside the front-view midline so it remains visible. The offset and large uncertainty radius explicitly mark the loss of back-surface information.
Point 8 of 11 in Do-In / Tao-Yin Self-Massage Circuit
Cross-tradition overlaps
No overlapping points are registered for this point.
Sources
Mawangdui Daoyin tu (導引圖), Tomb 3 silk manuscript (primary_canonical)
The Daoyin tu preserves illustrated movement and exercise figures in an early Han manuscript witness; it does not prescribe this modern eleven-point self-massage circuit.
Modern Do-In teaching manuals (secondary)
Secondary practical sources used for contemporary Do-In terminology, self-massage sequencing, and accessible point selection.