What does Yin Yang Embroidery in The Yin Yang Tattooist refer to?

Yin and Yang embroidery refers to the art of yin and yang incorporated into tattoos, so that the tattoos will have the similar functions of blessing reduction, sheltering, and transmutation as amulets, Buddha cards, and little ghost corpses.

Yin-yang embroidery originated from a local sorcerer in southern Fujian, who, in the process of tattooing people, discovered that making tattoos with dead people's blood could give people the ability to ward off evil spirits. In the novel, "tattoo" in China has a history of more than 5,000 years, alias "tattoo", the earliest "tattoo", can be traced back to the primitive period in the northeast.

Then the Northeast shamanism, will be the sap of the trees painted on the body, sketched out a picture of the strange pattern, to express the fear of the gods and the fear of ghosts and gods, more exaggerated, those tattoos are also said to be the gods give power. Legend has it that the Stone Age emperor Fu Xi, a "winged flying tiger" tattoo on his right arm, so the ability to pull mountains and rivers.

Expanded:

The Grand Finale

Outside the ancestral hall, goose feather snow fell, goose feather snow hit Li Shanshui's body, not out of the lonesome. "Master Li, remember! Fate can be disobeyed." I put my hands together at the side of my mouth, and Li Shanshui roared.

Li Shan Shui figure stuttered, soon, he walked away, while walking with his loud voice, said: water son, when Li Xingzu became famous, you help me to keep the gate, if he son is a character, let him revitalize the Northeast family business, if he is not a character, don't talk to him me and the Northeast Yin Rao things, let him feel at ease with the end of his life!

The big deal is that from now on the Northeast Yin people, can only become a symbol in history! "Fate can be disobeyed." I roared at Li Shan Shui with another effort. Li Shan Shui smiled and said, Fate can be disobeyed. In his eyes, there was bitterness, but in my eyes, there was determination.

I then looked down again, at Li Xingzu, and in his bony eyes, I had a hunch that he must be an even better yin and yang tattooist than me. Once an orphan, once a promise between men, I looked out at the shrine again, never to see Li Shanshui's back again...

Baidu Encyclopedia - Yin-Yang Tattooist