What does "luck" mean in divination?

People generally have eight steps of luck, once every ten years. Of course, everyone has a different departure time. Latest delivery time 10 years old.

In fact, childbirth is based on the five relationships of the five elements (self-nature, those who gave birth to me, those who gave birth to me, those who gave birth to me, and those who gave birth to me).

Then, with the cooperation of Yin and Yang, ten kinds of relationships are formed, which are called Ten Gods, specifically as follows: positive seal, partial seal, official, partial official, partial wealth, god of food, official injury, shoulder to shoulder and robbery.