It may be asked, from whence came the wizards and their charms, and their supposed power to subdue the bad influences of demons in disturbing neighbourhoods by apparitions and uncanny noises, and in causing sickness and death? It may be answered, that before the introduction of Buddhism, but especially in the Han dynasty, this folly was rife in the popular belief, and has continued so till now. There were wizards in the Shang dynasty, but no details remain of what they did. In the Han dynasty, the wizards stand out in their completeness. They were greatly honoured by prince and people, and have continued to be so in the person of the Chang T'ien-shi till the present day.
This personage assumes a state which mimics the imperial regime. He confers buttons like the emperor. He has about thirty persons constituting his courtiers and high officers. Tauists come to him from various cities and temples to receive promotion. He invests them with certain titles, and gives seals of office to those Tauists who are invested. They have similar powers to his, and can, for example like him, subdue demons by pasting
charms on doors, which prevent them from entering. The Chang Tien-shi, in his capacity as a sort of spiritual emperor, addresses memorials to Yu-ti in heaven. His position will be understood from this circumstance. He is chief official on earth of Yu-hwang-ti in heaven, and as such is in the habit of addressing to him "memorials" called piau. His duty is defined as the driving away and expulsion of demons by charms, and their destruction by the magic sword.
In all parts of China, the charms seen pasted on the doors of houses testify to the dominant idea of popular Tauism, and to the universal fear of demons, which Tauism encourages. Certainly it is not Confucianism that maintains in rigour this absurd dread of evil spirits wandering through the air, disturbing the public tranquillity, occasioning alarms which sometimes spread like an epidemic from city to city, and leading the uninstructed populace to trace fevers, madness, ague, drowning, accidental death of travellers, suicide, and any sort of unaccountable discomfort, to the imaginary agency of invisible and malevolent beings. To subdue them is the office of the Tauist magician. The person honoured with the credit of having invented the charm is Chang Tau-ling. It was called fu, because written on bamboo tallies such as were anciently used by officers of government, and which are made to fit in shape one with another as a security against imposture, in accordance with the meaning of the verb fu. They are to be seen pasted on door lintels, the occupants of the house believing that the sight of the magical characters written on the charm will prevent evil spirits from entering.