The mystery novel is one of China's classical novels, which mainly tells the stories and legends of immortals and ghosts. They came into being and prevailed in the Wei, Jin, Southern and Northern Dynasties, and were directly related to the social and religious superstitions, metaphysics and the spread of Buddhism at that time. Strange fingers and strange records mainly refer to novels produced in Wei and Jin Dynasties, which describe immortals and ghosts, and may also include similar works in Han Dynasty. Under the influence of the prevailing social atmosphere of talking about ghosts and gods and praising the supernatural, anecdotes were formed.