Attending function:cooling blood,purging fire for removing toxin ,used for pharyngalgia,scrofula,bloodshot eyes Shape and properties: cylindrical, length: 6-20cm,diameter: 1-3cm.surface color: Daffodil yellow or taupe. Hard,not easy to bent, section in black,smell similar like caramel, Faint scent, bitter taste.Attending function:cooling blood,purging fire for removing toxin,used for pharyngalgia ...