Monkey, because the monkey ranks ninth among the twelve zodiac signs. In ancient times, the twelve zodiac signs were used to measure two hours per zodiac sign. 2×9=18. The monkey happens to be the tenth day of the day. eight.
Many years later, the Jade Emperor began to choose zodiac signs. As the king of beasts, the tiger is naturally the zodiac sign. When the monkey saw it, he also wanted to be the zodiac sign. But the Jade Emperor has a principle in choosing zodiac signs, which is to do merit to mankind.
Monkeys have no merit to humans, so they are naturally not chosen. So the monkey asked the Tiger King to intercede with the Jade Emperor and let him be the zodiac sign. Because the Tiger King owed the monkey a favor, he had to do his best to intercede for the monkey and told the Jade Emperor about the wisdom of the monkey alliance.
As the head of the beasts, he also said that monkeys also contributed to the mountain control when he was not around. Therefore, the Jade Emperor issued an order to include monkeys in the zodiac. The monkey became the zodiac sign, and the Tiger King returned the favor to the monkey.
Of course, the Tiger King was still unhappy. The incompetent monkey was listed as the human zodiac alongside himself, and the friendship between the two was severed. Today, the beasts themselves are no longer afraid of monkeys.