What are ancient purple tapirs, elephants and spines? Why are there these three kinds of beasts?

Tapirs, also known as "dream tapirs", are beasts that can eat people's nightmares. Tapirs are ancient animals. According to Shan Hai Jing, tapirs live by dreams, and they are ancient beasts with great power. According to Bai Juyi, a writer in the Tang Dynasty, in Zanping, he recorded: "Tapirs, with their trunk, rhinoceros eyes, oxtail and tiger feet, were born in the south valley, and' sleep their skins to ward off evil spirits'. Dream tapirs are wonderful creatures. According to legend, they feed on dreams, devour dreams, and can reproduce the swallowed dreams. It is described that every night when the sky is covered with hazy moonlight, he sets out from the depths of the forest to where people live and sucks people's dreams. He won't be afraid to wake people who are sleeping while eating dreams, because he is timid by nature, and at night, he will only make a soft cry like a lullaby. So people fall asleep with this sound more and more, and tapirs slowly put people's dreams into their pockets one by one. After eating people's dreams, tapir quietly returned to the jungle and continued his mysterious life. It is also mentioned in Shan Hai Jing that eating dreams can take away nightmares and make people sleep. According to legend, dreams will be destroyed whenever the sky is covered with hazy moonlight at night. They set out from the depths of the forest to the places where people live and suck people's nightmares. Dreams will sing softly as if they were taken away, making people fall asleep sweetly with this sound. After eating a nightmare, Meng Xiao quietly returned to the forest and continued his mysterious life. Yun Xiang can't find the traction ridge, can't find it.