The nine-house fortune cycle means that in the eight-character horoscope, everyone will inevitably experience nine fortune cycles. Among them, each Grand Canal cycle lasts for ten years and is divided into two stages: Minor Canal and Grand Canal. In each Universiade cycle, according to the pattern of the eight-character horoscope and the attributes of the five elements, the corresponding fortune changes in terms of good and bad luck, career and wealth, marriage and family, etc. can be deduced. "Nine Palaces" refers to the Nine Palaces Grid, which is an important part of the eight-character birth chart and is used to express the arrangement and mutual relationship of the heavenly stems and earthly branches. In numerology, the Nine Palaces Grid is used to predict the fate of the owner and information about good and bad luck. Therefore, "there must be nine palaces for great fortune" can be understood as everyone will experience nine great fortune cycles. Each great fortune cycle is composed of nine palaces and the attributes of the five elements. It has great influence on people's destiny, good and bad luck, etc. important impact.