Introduction to the Dragon Beard Wall: The towering Dragon Beard Wall at the mouth of the canyon is a classic from the source of Taihu Lake. The large patches of Dragon Beard Grass growing on the stone wall float in the air. The vigorous and powerful inscription "Longxubi" with three large characters on the Longxubi was written by Guo Zhongxuan, a famous calligrapher. Clumps of asparagus grow on the stone walls; asparagus is a perennial herbaceous plant that blooms small white flowers in early summer every year. Its leaves can grow to more than one meter long, like a dragon's beard. The breeze blows and floats in the air, which is very spectacular. This is where the name "Dragon Xubi" comes from.