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.
According to folk tradition, Nanyang's head-dropping technique comes from Hinduism. When Master Sanzang of the Tang Dynasty went to India to worship Buddha for Buddhist scriptures, he passed through the Annan Tongtian River, which flowed into the upper reaches of the Mekong River in Siam, and sneaked into the bottom of the river for the tortoise to kill the Tang Priest. Although the Tang Priest didn't die, all the scriptures he was looking for sank to the bottom of the river. Fortunately, his disciples fished them out of the water, but only a part of Mahayana was recovered.