How can carp appear under the urn?

Generally speaking, people in most parts of our country hope to find a good place to bury their dead relatives. When burying, most of them put one or two small carp in advance, preferably the red one. Because the little red carp is lucky, they put it in a small jar or bottle, and put it under the coffin or urn. They hope that this little red carp can bring blessings to their relatives' black houses and make the next generation live better and better. It is generally believed that if young carp can survive for a long time, the local atmosphere must be very good, that is, the haunted house that can bring prosperity to the next generation. You said it should be good to be alive after being buried for decades, but it is not good to dig it out.