The traitors, villains and heroes sung in those operas fell from the paper into the world, running around to make a living and care about money and food, but they just blended into the Yunyun and became living beings; dipped the pen in the river water at will, carefully studied the three or two grievances, one or two love and hatred of a certain life, and the Yunyun that person fell on the paper became a corner of the book...
The world is chaotic, people's hearts are confused, their eyes are unclear, and their ink is indistinguishable. One place is described at random...
Imaginary history, solving crimes in ancient style, updated as chance comes.