But what animals to choose? After thinking about it, the emperor decided to organize an animal river crossing competition on his birthday, taking the top twelve animals as the twelve zodiac signs, as the chronology of the year. After the news spread, all the animals are not riveted, eager to try, want to get a place in the twelve zodiac. And finally the mouse used a scheme, got the first, buffalo got second, tiger third, and so on, that is, the order of the zodiac, should have been the dragon first, but because the emperor ordered it to rain, so the dragon came late, and the cat is due to the mouse intentionally told it a wrong time to play, resulting in it missed the game, so it did not get on the list of the Chinese Zodiac, which is the reason why the cat and the mouse do not **** Dai Tian. Later, these twelve animals, it became the way mortals record the year, the year of the ox, the year of the dog, the year of the snake and so on.