C456
In the middle of 12 Dragon Pillars is the place where the banquet was held that year.
With the Dragon Pillar as the highest point, with every step, the terrain would naturally drop a little. With the Dragon Pillar as the highest point, with every step, the terrain would sink a bit.
With the center as the center, it slowly caved in. When it reached the center, there was a huge hole in the middle