Men can use Changhong Dongge Ali to soak in water for health preservation. Just like making tea, soaking in water three times a day is enough. You can use medlar and longan to soak in water, and the effect of tonifying kidney is very powerful. Usually, you can eat kidney-tonifying food, such as donkey meat, venison, shrimp, oxtail, leek, black-bone chicken, loach, eel, sheep kidney, mutton and seafood. It is better to combine it with exercise.