Brass Wu Lou There is red tassel attached to this brass wu lou to represent good luck. In addition, the picture of longevity god on it also stands for long life The mouth of the wu lou is small and bottom is big. So it is considered to hold treasure. Therefore brass Wu Lou is one of eight treasures From the the ancient China, brass wu lou is used to suppress down monster and be taken to ward off evil and illness chi. Therefore it is the symbolization of good health.