Athena Chu: Hello.

Interpretation: One of the skills of ancient alchemists. It originated from Yi Ganwei's Letters and flourished in the Southern and Northern Dynasties. The narrator believes that he was born in the Yellow Emperor, and nine days later he was born in Xuannv. Its method takes B, C and D as the three wonders, and E, Ji, Geng, Xin, Ren and Gui as the six instruments. The three wonders and six instruments are divided into nine palaces, and the first palace is unified. It is regarded as adding good luck and avoiding, so it is called "Tibetan armor".