In the autumn of 705 BC, how did Master Zhou divine Chen Ligong's son?

In the autumn of 705 BC, Zhou Taishi, a hereditary official in charge of drafting royal documents, planning princes and doctors, and compiling history books, passed by Chen Guo and went to congratulate him when he saw the great sacrifice of fruit chan. As the Taishi is also in charge of Chinese studies, astronomical calendars, sacrificial divination and other work, Chen Ligong wants to ask his son about his future. Zhou Taishi divined divination with divination, and everyone was happy. Because Master Zhou happily told Chen Ligong, "Your son is rich and talented, and his descendants may be kings in the future."