In some myths and legends, it is a rabbit that lives on the moon. At present, it is believed that it is caused by utopian illusion. In many cultures, especially in the folklore and Aztec mythology of East Asia (China, Japan, Korea and Taiwan Province Province), it is often depicted as a mortar with a pestle.
In China mythology, the Moon Rabbit accompanied Chang 'e in the Moon Palace, while in Japan and South Korea, the Moon Rabbit pounded hemp on it, and in Taiwan Province Province, there is also a saying that the Moon Rabbit pounded hemp.
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It is recorded in Bensheng Jing that foxes, otters, monkeys and rabbits go to the monks every day to listen to their teachings. One year, when there was a drought, the monks wanted to move, and the four animals wanted to keep it for themselves.
The rabbit felt powerless, so he threw himself into the fire and regarded himself as food. Monks reveal Indra's real body and draw rabbits on the moon as a souvenir. There are similar stories in ancient and modern Japanese stories, in which the rabbit's companions become foxes and monkeys.
Baidu Encyclopedia-Moon Rabbit