Ji Fang Huangqi Decoction is mainly used to treat diseases caused by deficiency of vital qi, weakness of defense, exogenous pathogenic wind and dampness in lower limbs. Duhuo Jisheng decoction is mainly used to treat the disadvantage of lower limbs caused by wind, cold and dampness caused by liver and kidney deficiency. Ji Fang Huangqi Decoction mainly focuses on invigorating qi and expelling wind, invigorating spleen and eliminating dampness; Duhuo Jisheng Decoction is mainly used for nourishing liver and kidney, qi and blood, expelling wind and removing dampness.