The Partnership between Cat and Mouse is a fairy tale in Grimm's fairy tales, which was collected, sorted and processed by jacob green and william green brothers. It tells the story of a cat meeting a mouse. The cat said that it likes mice very much and is willing to make friends with them. The mouse was persuaded by the cat and agreed to live with the cat. When winter came, they bought a can of lard together for the winter. They put lard where no one else in the church can eat it. Because the greedy cat wanted to eat lard, it tricked the mouse into stealing lard. The cat lied to the mouse three times in a row. The first time, it licked up the top layer of lard, the second time, it ate half a can of lard in one breath, and the third time, it ate all the remaining lard. Winter has really come, and there is nothing to eat outside. The mouse told the cat to eat lard together, only to find that the jar was empty, and the mouse suddenly realized. Not only did the poor mouse not eat lard, but it was also eaten by the cat.