What does the fortune teller mean by "20-80"?

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I wish you a happy life.

The ideal is great and the imagination is rich; Pursue self-realization, regardless of the result, only pay attention to the process, even if you encounter difficulties or dangers, you will not shrink back. The advantage is that you dare to dream and have lofty ideals and ambitions; Pay attention to honor and responsibility. The disadvantage is that it is too subjective and does not attach importance to other people's opinions; Too many ideas, unrealistic.