What is the "ice tablet" in Chinese medicine?

Ice sheet, sex pungent, bitter, slightly cold. It can be used as a medicine for the heart, spleen and lungs. The effect is to open up the eyes and wake up the mind, clearing heat and relieving pain. The main treatment of closed evidence of dizziness, eye redness, swelling and pain, throat sores, sores do not collect, water and fire burns. There are three sources of ice chips: 1, naphtha resin processing products or naphtha trunks, branches, chopped distillation cooling crystals, called "naphtha ice", "Plum Tablet". 2, the sublimation of the leaves of the Asteraceae plant Ainaricaceae processed products, called" Ai Tablet". 3, the Ainaricaceae plant sublimation of leaves, called" Ai Tablet". 3, turpentine, camphor and other chemically synthesized products, called "mechanism of ice".