In front of the Three Halls, there is an ancient mulberry tree with an age of over 300 years and a distinctive appearance. The five thick bowl shaped roots of the tree are tied to the ground like the claws of a giant dragon, corresponding to the five branches separated above. The most magical thing about this mulberry tree is that it blooms and bears fruit continuously from April to August every year. Ordinary mulberry trees bloom and bear fruit once a year. The temple worships the five generations of the Guan family, including their great grandfather, grandfather, father, Guan Ping, Guan Xing, and Guan Gong, This mulberry tree blooms and ripens five times a year to honor the five generations of the Guan family, and is named the Five Generations of Tongtang Mulberry.