Because the Queen Mother of the West is in love with Zhou Muwang, the place where they often meet privately is bronze doors. Later, they learned the secret of immortality. Since then, the Queen Mother of the West has been pursuing the secret of immortality and tried many methods, including snakes. The Queen Mother of the West achieved immortality by raising snakes and realized the symbiosis of "snakes and people".
In the myth system, all the descendants of Nu Wa empress have a snake tail, just like Zhao Linger in The Legend of the Sword and the Chivalrous Man, so it is not surprising that the Queen Mother of the West realizes immortality through the symbiosis between snakes and people.
In addition to longevity, the Queen Mother of the West has another purpose, which is to protect the ancient tomb for her. Wu Xie met many snakes in the quotations from Snake Marsh, including pheasant necks and giant snakes, and also met the king of snakes in the Imperial Palace. If it weren't for Yu Pei, the Iron Triangle would be here. And this is what the Queen Mother of the West hopes to achieve. After all, there is a very big secret in her grave. Meteorite jade is here, and she definitely needs a guardian. The guardian chosen by the Queen Mother of the West is a snake. She keeps many snakes to protect herself.
Wu Xie can kill people instantly when he meets a snake with very strong attack power. A Ning was directly killed by a pheasant's neck for taking a bath by the river.
On the road of pursuing immortality, the Queen Mother of the West will surely have many coveted people, and the secret of her own meteorite jade will surely be remembered and even taken away by many people. Therefore, the Queen Mother of the West keeps so many snakes in order to confront and deal with her enemies through snakes. At first, the Queen Mother of the West must have kept many snakes, but she died because of survival of the fittest or natural conditions, so although many snakes were seen in Wu Xie, they were rare.