Does the date and time of birth determine the length of life?

According to Guiguzi's fortune-telling method, life span can be calculated from the time when a person was born, that is, the date of birth, but in real life, a person's life span is also inaccurate, because if a person does more good in the world, he can increase his happiness and prolong his life span, and if he does bad things, he will also reduce his happiness and shorten his life span. As the saying goes, saving a life is better than building a seven-level pagoda. If he really does something good to save lives, his life will be extended. Some people will say that a good man will not live for a thousand years but die early because God either sent him to heaven or entrusted him to a good family to enjoy a better return. Some people do bad things but don't get what they deserve, because they did too many good things in their last lives, so they live well even if they fold a lot of good things. After a word, do more good deeds and do more good deeds, and naturally there will be blessings and longevity.