People who want to tell fortune must provide the date and time of birth. Why?

First of all, the year, month and hour of birth have different yin and yang and five elements respectively. The ancient fortune-telling methods in China were basically based on the Book of Changes. Well, so the words are similar, so providing time is to infer the bad luck brought by the year you were born, because according to China's ancient view, a person's birth time will bring a fixed course to his life, and based on this view, the future will be deduced. Because everything is predestined, we need to calculate what you will experience in a certain period of time. Of course, all this is based on the idea that you have been doomed from birth.