Wild land is a place where it grows naturally, not cultivated artificially. Rehmannia glutinosa is divided into Radix Rehmanniae Preparata, Radix Rehmanniae and Radix Rehmanniae. The raw land is cool and sweet, and enters the heart, liver and kidney meridians, which can not only cool blood, but also nourish yin, and has the effects of clearing away heat and nourishing yin, cooling blood to stop bleeding, promoting fluid production and quenching thirst. Modern pharmacological research shows that Rehmannia glutinosa has anti-radiation, liver protection, hypoglycemic, cardiotonic, hemostatic, diuretic and antifungal effects. Need to be reminded, please follow the doctor's advice and don't use drugs privately.