Excerpted from Bensky:  Chinese Herbal Medcine Materia Medica

• Combine with Zhi Fu Zi and Bu Gu Zhi for pain and cold sensation in the lower abdomen, lower extremities, and lower back.
• Combine with xiao hui xiang and wu zhu yu for bulging disorder due to cold from deficiency in the addomen and testicles, or, in extreme cases, contraction of th scrotum and a localized sensation of icy cold.  this combination is also use dof dysmenorrhea.
• Combine with mu gua, ji xue teng, and bu gu zhi for symptoms assicoates with damp-cold let qi such as soreness and swelling of the legs, sensationa of heaviness, cold, and pain exacerbated by exposure to cold, a deep, slow, pulse, and a white, greasy tongue coating.
• Combine with fu pen zi and huang jing for spermatorrhea, back pain, and diminished sexual function associated with Kidney deficiency.