Bushen Yiqi is considered from two aspects. On the one hand, it is vitality, which is connected with renin, and Yuanyang is the innate foundation of kidney. On the other hand, Yuan was the same as Huang in ancient times. Nourishing yuan means nourishing yellow, and yellow is good for the spleen and stomach.
Nourish vitality, nourish kidney and nourish congenital Yuanyang.
Consolidate the foundation and strengthen the kidney qi, and cultivate the acquired spleen and stomach at the same time.