2)◎ sacrum D ǐ
The end of the spine [sacrum]. Such as sacrum (coccyx)
sacrum
◎ Radical strokes: 9
◎ Total travel: 14
◎ Traditional Chinese characters: sacrum
◎ Chinese character structure: left and right structure
◎ Simplified root: bone
◎ Word-making method: form and sound
Interpretation of Kangxi Dictionary
Kangxi's strokes on the upper bone of Haiji: 15. Outward stroke: 5.
"Guang Yun" is the same as "Jiyun". Boya is called sacrum.
Also "jade piece" hip also.
There is also the ceremony of cutting "Jiyun" and recording it. Yitong