A traditional Beijing opera model play tells a story from the historic fiction Three Kingdoms "Battle in the Red Cliff". Cao Cao dispatched his advisor Jiang Gan crossing over the river to persuade Zhou Yu surrender. Zhou Yu had a plot to set Cao Cao against his generals by employing Jiang Gan and invited Jiang to stay with him in the night after reception. Jiang found a letter on Zhou's desk that revealed that Cao Cao was in danger of being assassinated.
