What does the two-story canopy of the Palace of Life represent?

Take the earthly branch on the day you were born as the canopy. For example, the earthly branch on your birthday was one of the garrison troops in Yin Wu, and the earthly branch that year was also the canopy. In a few short sentences and two beats, it was mentioned that the doomed man, Gai Hua, wanted to become a monk. Many fate books say that Gai Hua, who is doomed to fail, is clever, but he is lonely all his life. The fire of life is a monk, and the destiny is the Tao.