Health preservation is a good thing, but it can't be used casually. Chinese patent medicines are now divided into Liuwei Dihuang Pills and Bawei Dihuang Pills (Jinkui Shenqi Pills). Among them, Liuwei Dihuang Pill is mainly used to treat kidney yin deficiency, and Jinkui Shenqi Pill is mainly used to treat kidney yang deficiency. Drugs should be used according to different symptoms. Although they are all tonifying kidney, their functions are completely different. If drugs are used in reverse, there may be other adverse effects. It is suggested to see a Chinese doctor before taking the medicine, judge the physique and current situation of the elderly, and choose the medicine according to the specific situation.