In ancient times, it was commonly known as "grass ghost" in Miao area. According to legend, it is attached to women, harming others and harming themselves. Those so-called witches are called "grass ghosts". After investigation, some Miao scholars believe that almost all Miao people believe in this law, but the weight varies from place to place. They believe that in addition to the above-mentioned emergencies, some intractable chronic diseases such as long-term cough, hemoptysis, dull complexion and emaciation, as well as symptoms such as visceral discomfort, bowel sounds, abdominal distension and loss of appetite are all possessed by this method. It's sudden, so it's good to let the so-called liberators get it back by calling the village. If you are a chronic patient, you should invite a wizard to "drive away the poison". This daunting method is not the exclusive right of Miao people. Magic techniques were widely spread in ancient Jiangnan area of China. Method originally refers to insects born in utensils, later moths born after food spoilage, and insects born from other objects are also called methods. The ancients thought that this method was mysterious in nature and extremely toxic, so it was also called poison method, which could enter the human body through diet and cause diseases. The patient seems to be confused by ghosts. Most of the ancient poisonous insects mentioned by pre-Qin people refer to mysterious poisonous insects that naturally occur. Long-term superstition of poison law has formed the concept and practice of making laws to harm people. According to scholars' research, during the Warring States Period, some people in the Central Plains used and taught the method of sinning. Legend has it that the production method of poison method is generally to put snakes, scorpions and other poisonous insects into the same object, let them bite and kill each other, and finally only poisonous insects are left. There are many methods, among which snake method, dog method, ghost cat method, scorpion method, toad method, insect method and flying method have great influence. Although it looks tangible on the surface, it has been regarded as a mysterious thing since ancient times. It can fly, change, shine and come and go freely like a ghost. The caster can use magic to remotely control the caster, which will bring various diseases and even death to the caster. The ancients believed in the magic of poison to cause disease. In the eighth year of Li Qing (1048), Song Renzong published a book "Good Governance Prescription" in Li Qing, which introduced the method of governance. Even medical books such as Treatise on Febrile Diseases, Thousand Golden Formulas and Compendium of Materia Medica have detailed prescriptions for TCM method analysis and treatment of symptoms. In the conceptual world of Miao people, there are snakes, frogs, ants, caterpillars, sparrows and turtles. The method has multiplied in the person who owns it. If you can't find food, you will attack the person who owns it and ask for food. If the method master feels uncomfortable, he will vent it and endanger others. When releasing the magic, the magician said to himself, "Go find someone to eat and leave me alone!" This method will automatically find that person. Or dozens of meters away, the method will fly to that person with a snap of your finger. Some people even say that whoever the method looks at is who you fall in love with and let its owner give it to. Otherwise, this method will kill its owner, so those skilled people must give it up. There is such a story about releasing demons among Miao people: