According to legend, when the Yueyang Tower was rebuilt, there was a big cold wave, and the weather was particularly cold, and the local vegetables froze to death. Carpenters who repair buildings can't eat fresh vegetables, all of them are sallow and emaciated, and their eyes can't see clearly. So, a few brave craftsmen went to the lake to catch fish and shrimp, so as to deliver meals to the masters who repaired the building. However, they were busy in the cold lake for a long time and didn't even catch a small fish. The craftsmen were about to go back when suddenly an old man with white hair came with many shavings in his hand. He grabbed a handful and scattered it in the lake. He also read: "Planing wood flowers, planing wood flowers, quickly turning fish into shrimp. Catch more than ten kilograms today and nourish thousands of families in the future. " As soon as the old man finished reading this spell, he saw that the plane he threw into the lake immediately turned into many small fish. However, these fish have no eyes and scales. So, the old man took out Mo Dou from his bag, mixed the sand and ink on the beach, grabbed a handful of black sand and sprinkled it on the fish on the lake. In this way, those small fish immediately have scales and eyes again. The craftsmen quickly fished these fish back to the masters who repaired the building to satisfy their hunger. The masters had small fish to feed their hunger, and their physical strength gradually recovered, and they also had the strength to work, and soon built a spectacular pavilion.