Stone ear is a plant of the phylum lichen. It is named for its shape like ears and grows in the damp crevices of cliffs. The body is flat, irregularly round, brown on the top and black hairy on the back. Shiershan contains high protein and trace elements, is the nutritional value of nourishing food, is a rare and precious delicacies. The stone ears of Huangshan are known as one of the “Three Stones of Huangshan”. It is produced in the mountains of southern, southwest and southern Shaanxi, and is one of the famous “Three Stones of Mount Lu” (the other two stones are rock chicken and rock fish).