Chinese woodcut: Daoist internal alchemy (8)

Woodcut illustration of the practice known as 'Intercourse of sky (qian) and earth (kun) [trigrams]' from Xingming guizhi (Pointers on Spiritual Nature and Bodily Life) by Yi Zhenren, a Daoist text on internal alchemy published in 1615 (3rd year of the Wanli reign period of Ming dynasty). (Cataloguing incomplete)

PICTURE TITLE: Intercourse of sky (qian) and earth (kun) [trigrams] OTHER LETTERING: (Cataloguing incomplete) (Cataloguing incomplete)