The difference between Sheng Hua Tang and Si Wu Tang is mainly reflected in the different composition of the formula, different efficacy and different target groups. 1. Differences in formula composition: Biochemical Tang is mainly composed of Angelica sinensis, peach kernel, Rhizoma Ligustici Chuanxiong, dry ginger and licorice. Four Substances Tang is mainly composed of Radix Rehmanniae Praeparata, Radix Angelicae Sinensis, Radix Paeoniae Alba, Rhizoma Ligustici Chuanxiong. 2. Differences in efficacy: Sheng Hua Tang is mainly used to treat post-partum discharges and cold pain in the abdomen caused by blood deficiency and cold condensation or stagnation of blood stasis. Four Substances Tang is mainly used to treat dizziness and dizziness, scanty menstruation or amenorrhea, and pain in the umbilical cord and abdomen caused by deficiency of qi and blood, and poor blood circulation. 3. Different for the crowd: biochemical soup for the crowd is mainly postpartum or termination of pregnancy women, including normal delivery and cesarean section can use biochemical soup to regulate. Four things soup is mainly for women’s camp blood deficiency after the tonic blood line blood regulation. The adverse effects of Siwu Tang are not clear. It is contraindicated if there is excessive discharge, bleeding, or even sweating, shortness of breath and fatigue (dysphoria), and should not be used if the blood is hot and there is stagnation of blood in the postpartum period. The adverse effects of Four Substances Tang are not yet clear, and should be used with caution in cases of yin deficiency and blood heat. The above two drugs need to be used under the guidance of a physician to identify the evidence, blindly used on their own may lead to adverse reactions.