Tiantai Wuyao, which grows in Tiantai Mountain, is a bright pearl in the treasure house of Chinese medicine. It has the reputation of “Chinese treasure”. "Compendium of Materia Medica" records: black medicine, the winner of the Tiantai. In the Dictionary of Traditional Chinese Medicine, there is a record of the highest yield and good quality of the black medicinal herbs in Zhejiang. The habit of using the best products in Tiantai is the best, so it is called ‘Tiantai Wuyao’ or ‘Taiwu Medicine’. Only the unique natural geography of Tiantai can create the special quality of Tiantai Wuyao and become the top quality of black medicinal herbs. This is a mysterious phenomenon of 30° north latitude.