The nine-tailed fox first appeared in Shan Hai Jing. "On the Mount Qingqiu, there are wild animals. They are shaped like foxes and Kyubi no Youko, and their voices are like babies. They can eat people, but those who eat them are not in danger." It means that the nine-tailed fox lives in Qingqiu country. It has four feet and nine tails. Sounds like a baby. It eats people.
Legend about the nine-tailed fox:
The legend of the nine-tailed fox is different from one dynasty to another.
Shan Hai Jing records the clear autumn and the nine-tailed fox, which is called "Kyubi no Youko" for short and "Kyubi no Youko Chicken" for short. It was first seen in the pre-Qin dynasty and spread to the Han dynasty as an auspicious beast, symbolizing the prosperity of kings and being mentioned in many ancient books.
Some scholars believe that the images of "Qingqiu Country" and "Nine-tailed Fox" in The Classic of Mountains and Seas come from the "tail lodge" in "Oriental Dragon" because there are nine planets at the tail. Yu met the legends of "Tu Shan barren woman" and "nine-tailed white fox" when he was in charge of water control, which is a tortuous inheritance of Yu's water control thought to Ji Wei.
Yu Xia passed by Tu Shan and heard a white fox singing, so he got married in Tu Shan and established the Xia Dynasty with the help of Kyubi no Youko.