Bazi has many usages. One of it to tell our life potential apart from life path, our character etc. Bazi astrology is divided into 2 major part. First is the Destiny chart or sometimes called the Natal chart or in chinese is called the Ming Pan. The 2 part is the Luck cycle. Luck is again divided into 2 parts, the Major and the Annual Luck. We can go down to month, day and hour luck but that would be too complicated.
How each component plays their part to our lives? Well, Destiny chart determines who we are at birth that is our parents, our relationship with our spouse, siblings, parents etc. Luck cycle will alter the level and hence the outcome of our lives.
If one has a good Bazi and luck is also good, for sure the person will have a wonderful achievements.