Legend has it that the dragon back wall is not a wall, but a mountain. The ancient dragon king in the South China Sea is old, so he dotes on Xiaolong, but Xiaolong is naughty and willful, causing trouble everywhere. Until one day, Xiaolong really ran into a big disaster, accidentally burned the Temple of Heaven, and the flustered Xiaolong returned home. God will not let Xiaolong go. In order to save his son, the Dragon King of the South China Sea pretended to be a little dragon and lay at the foot of Panlong Mountain to be struck by lightning. Seeing that his father was burned black and blue and dying, Xiaolong felt remorse and rushed out to bear the punishment. In order to stop his son, the Dragon King ran into the King Kong wall beside him and died on the spot. "It's your father's fault that you don't teach." The Dragon King of the South China Sea thought it was a fair death. After death, the body turned into Longbei Mountain. After this disaster, Xiaolong suddenly realized that he should abide by his duty and be kind to others all his life.
Later generations renamed peron the peron wall, because this wall blocked all the crimes of the little dragon king. Therefore, later generations called it the peron wall.