There is no such thing as the “fastest way” to replenish yang qi, which can be regulated by taking Chinese medicines according to the situation. For example, the medicines such as the Pill of the Possessed Son, the Pill of the Kidney, and the Pill of the Four Spirits. Insufficient yang qi may be caused by spleen yang deficiency, kidney yang deficiency, spleen and kidney yang deficiency and other reasons. 1. Spleen yang deficiency: Clinical manifestations include loss of appetite, hidden pain in the abdomen, light mouth and lack of thirst, etc. Medicines to warm spleen yang can be taken, such as Radix Rehmanniae Pills. 2. Kidney yang deficiency: clinical manifestations of lumbar and knee weakness, lower limb edema, urination and other symptoms, men may have impotence and premature ejaculation, and women may have uterine cold infertility. This kind of situation can be taken to warm the yang and tonify the kidney medication, such as Jisheng Kidney Qi Pills and so on. 3. Spleen and kidney yang deficiency: Patients with both spleen yang deficiency and kidney yang deficiency, manifesting symptoms such as loss of appetite, lumbar and knee soreness and weakness, fear of coldness and coldness of limbs, and clear and long urination, etc. Medicines to warm and tonify the spleen and kidneys, such as Sishen Pills, etc., can be taken. Patients with yang deficiency are advised to go to regular hospitals in time for treatment under the guidance of professional doctors’ diagnosis.