There was a character of "Gu" in inscriptions on bones or tortoise shells of the Yin-Shang Dynasty,which shows that,three thousand years ago,people had found the animals that live in the human body.
In dealing with advancing or withdrawing, entering society or being a recluse, hexagrams Gu (Arresting Decay, the 18th hexagram in the received version of Zhouyi) and Dun (Retreat, the 33rd hexagram) advocate a eremite life.
2) venomous worm of witchcraft
The controversies about "venomous worm of witchcraft" reveal the ways of imagining and constructing other based on self-centrality and the separation from the neighborhood.
3) the hexagram of Gu
Oracular shells excavated at Zhouyuan and the hexagram of Gu in Zhouyi;
4) Gu Du(poison)
And Gu Du(poison) is the most mysterious portion of black withcrafts in Songs folk culture and causes a great disaster in peopless social lives.
《夷坚志》补志卷二三之“黄谷蛊毒”是研究宋代民间蛊毒巫术的重要文献 ,其所涉及的四种蛊毒 ,是宋代民间的主要蛊毒类型 ,是宋代民间黑巫术中最具有神秘性的一部分内容 ,对社会生活产生了极大的危害 ;由于其具有特定的药理学与心理学依据