What does it mean to arch a bead at the mouth of Sanlongkou?

Three dragons arch a pearl, which means three dragons play with pearls. It means that three dragons are playing (or grabbing) a fireball. Its origin comes from the planetary map in astronomy, and the fireball evolved from the moon. Three dragons playing with beads has become an auspicious and festive decorative pattern, which is mostly used for the decoration of buildings and noble and luxurious utensils. The fish jumped over the dragon gate. In ancient times, it was said that yue longmen, the carp of the Yellow River (referring to the Longmen at the narrowest part of the Shanxi-Shaanxi Grand Canyon where the Yellow River roared down from Hukou, now called Yumenkou), would become a dragon. Metaphor career success or status promotion.