Neijing Map is also called Interior Map. According to historical records, its embryonic form originated from the Interior Map painted by Yan Luozi (or Yan Luozi), a famous hermit in Wangwu Mountain in the late Jin Dynasty. This picture is also a cross-sectional view of the human body. It skillfully metaphors the operation of human viscera and meridians with images such as mountains and rivers and figures, and reveals the operation law of human essence, qi and spirit and the cultivation method of Ren and Du meridians, which has dual values of medical solution and religious practice. Inner alchemy practice pays attention to breathing and pranayama, refining qi, refining spirit, and refining spirit is still empty. When practicing, first get through both Conception and Governor vessels, and then go through three levels (Tail Lu, Jiaji and Jade Pillow). This picture is divided into three parts: chest and abdomen, covering Yin and Yang, five elements, etc. It vividly expresses the activities of zang-fu organs and meridians and their dependent relationship during Taoist cultivation, and highlights the cultivation process of keeping healthy and repairing the truth and the law of returning to nature after birth.