1. When God created the world, he gave people a life span of 30 years and asked them to live happily, but there were too few people. God made a donkey, and he can live for 30 years with hard work all his life. However, the donkey felt too bitter and demanded that his life span be halved. People immediately asked donkeys not to live longer, and people could live to be 45 years old. Later, God made a dog and gave it a life span of 30 years. He asked it to take good care of its property and stay awake at night. Dogs also feel pain and demand that their life span be halved. People also ask the dog to reduce his life span, so he is 60 years old.

2. Later, God created the ape and gave it a life span of 30 years. He also said that it can live a carefree life, but it can only have a bare and wrinkled face. The ape still refused to accept it, and gave half his life span to people. As a result, people are destined to work hard like donkeys for fifteen years, be suspicious like dogs for fifteen years, be glassy-eyed like apes for fifteen years, and live as individuals for only thirty years.