Bai Zhi, a Chinese herbal medicine, can release the exterior, expel ... , removed from rootlet and soil, and dried in the sun or at a low temperature. They are then soaked in water ... body.4. Dilates coronary arteries.ContraindicationsBlood or Yin Deficiency.Open boils or sores.Pregnancy. radix angelicae dahuricae (bai zhi, angelica root) herb slices ...