One day, a King has a contest for all animals. Which animal reaches the heaven will be King of all the animals. There could only be 12 animal participate.
Cat and mouse is best friend. Cat want mouse to sign up for cat because cat is lazy. So when mouse reach the sign up paper, he saw that there are eleven animals that sign up already: ox, tiger, rabbit, dragon, snake, horse, goat, dog, chicken, monkey, and pig. So mouse signed for himself. When he got home, cat asks and mouse answered that he signed for cat.
Mouse set out early in the morning because he is scare of cat, but have confidence himself that he will be king of all animals. Cat came into mouse’s room, cat finds out that mouse set of for the contest. Then cat chase after mouse. When mouse saw ox, he know that cat will chase after so he pleaded ox to help him and he will help ox to be the King of all animals.  When cat finds that mouse is with ox, cat is scare of ox because ox is a lot stronger than cat, cat dare not to come close. So that is how cat hated mouse so much and became enemy.
As they climb mountain to mountain and almost reaches the heaven. Mouse really wanted to be the King and told them to take a rest so mouse can think of a way to get first place. As resting, mouse was thinking to push ox down the mountain. So he told ox to wait, and wander around. He saw two tree with vines just aside of the mountain. So pull the vine to each of the tree and yell to ox that the finish line is just up ahead. Ox got excited and ran, so he trip to the vines and fall back to mountain to mountain. So mouse ran and ran as fast as he could and reaches heaven and got first place.