A thousand-year-old tortoise and ten-thousand-year-old tortoise was an idiom that described a person's longevity and deep blessing. This idiom comes from a story: A long time ago, there was a man called Wang Ba. His life span was very long, reaching hundreds of years. Wang Ba often talked about his lifespan with others. People thought that he was a thousand-year-old Wang Ba and a ten-thousand-year-old turtle. Because of this, he was respected and envied by people. However, Wang Ba was not a real turtle. He was a goldfish. Although his lifespan was long, his reproductive ability was very poor. Therefore, his lifespan was not determined by the characteristics of the turtle. On the contrary, this idiom praises people's longevity and good fortune through their yearning for longevity and good fortune. This idiom can be used to describe a person or an organization's longevity and good fortune, or to praise a person's longevity and good fortune.