What does it mean to hold the moon in a double dragon?

The double dragon holding the moon refers to the ninth five-year plan on earth, which was transformed from the real dragon in the sky. In the Tang Dynasty, the double dragons embrace the moon, which means that in the underground Ming building, the Ming building is divided into three connected buildings, surrounded by two dragons in the middle, and the shape of the Ming building in the middle is uneven, regardless of the front, back and left. Seen from a distance, it looks like a bright moon rolled by two dragons. Since the Tang Dynasty, the double dragon embracing the moon has gradually evolved into a treasure cave.