Both raw earth and ripe earth belong to the same herbal medicine Dihuang. It is the method and manner of preparation that is different. The main role of raw Di Huang is good at clearing heat and cooling the blood, nourishing Yin and generating fluid, nourishing Yin and tonifying the kidneys, and is generally used clinically to treat dry mouth and throat in diabetes. Dry mouth and thirst. The role of rehmanniae is to tonify the kidney, fill the essence, nourish the blood and invigorate the blood. It is generally used clinically to nourish the kidneys and fill the essence, and also to nourish the blood and invigorate it. It is useful for male sexual dysfunction and female reproductive development. Raw Dihuang can be changed into ripe Dihuang through concoction.