dì huáng / shì / zhōng yī / cháng yòng / de / yí wèi / cǎo yào / yǒu / qīng rè liáng xuè / de / gōng xiào地黄是中医常用的一味草药,有清热凉血的功效。Rehmannia is a commonly used Chinese herb, with the effect of clearing heat and cooling the blood.