Within this formula, Shu Di (cooked Radix Rehmanniae) is the sovereign ingredient. It enriches kidney yin, boosts the essence, and fills the marrow. Shan Zhu Yu (Fructus Corni) assists in warming and enriching the kidneys and boosting the liver. Shan Yao (Radix Dioscoreae) enriches the kidneys and supplements the spleen. Ze Xie (Rhizoma Alismatis) and Fu Ling (Poria) lead yang down into the yin tract (i.e., into the urinary tract), thus leading ministerial fire back down to its lower source. Dan Pi (Cortex Moutan) drains liver fire and cools the blood. In addition, it quickens the blood and transforms stasis. Zhi Mu (Rhizoma Anemarrhenae) supplements yin and drains fire, while Huang Bai (Cortex Phellodendri) clears heat and eliminates dampness. Some Chinese authors also say that the combination of these two medicinals also leads ministerial fire back down to its lower source. This formula comes from Qin Jing-mings Qing dynasty Zheng Yin Mai Zhi (Patterns, Causes, Pulses & Treatments) published in 1702

Prepared Rehmannia root [Shu Di Huang], Asiatic Dogwood fruit [Shan Zhu Yu], Chinese Yam root [Shan Yao], Tree Peony root [Mu Dan Pi], Poria sclerotium [Fu Ling], Alisma rhizome [Ze Xie], Anemarrhena rhizome [Zhi Mu], Phellodendron root [Huang Bai].