The three kings of short stories in the world were O Henry, M. Daupassant and Tolstoy. These three were regarded as the treasures of world literature. O. Henry's works usually had humor and clever plots. His novels appeared in the form of multiple-act plays and were often featured by the reversal of the ending. His works were known for exposing the dark side of society and describing the complexity of human nature. His works usually contained profound thoughts and rich cultural implications. Tolstoy's works covered various historical periods and social classes, showing the grand social theme and the complexity of human nature. Their works had a profound impact on world literature and were widely read and appreciated.