1, for human hair made of charcoal. Take the hair, remove impurities, alkaline water to wash away grease and dirt, rinse with clean water, dry in the sun, simmering calcined into charcoal, cool.

2, physiological properties: this product is irregular block, black and shiny, with most of the fine pores. Light, brittle. Burning with fire has charred gas, bitter taste.

3. Indications: It is used for spitting blood, hemoptysis, epistaxis, hemorrhagic drenching, blood in urine, blood in stool, leakage, bleeding from trauma, and urinary incontinence.