Parents are not bad, but rich without officials. How to understand this sentence?

Xing Fei Feng Shui will draw a plan of the ruined house and its layout, and cooperate with the astrolabe of the house to collect mountains to ward off evil spirits, and operate according to the principle of "reaching the mountain direction". This is the usual technique. Of course, if you understand that "three kinds of parents' hexagrams are worth a thousand dollars." 24 road out of the senior officials, Fei purple into Chang' an. Parents are not bad, but rich without officials. The meaning of this sentence is more detailed in application. That is, "only being on the star is the most expensive, leaking secrets." " "