The kidneys are the foundation of congenital constitution and the source of human life.
Whether a person is young or not is directly related to the state of their kidneys.
That's why there's a saying that everyone has two ages: one is physiological age, the other is chronological age.
Some people are in their twenties but have the kidneys of someone in their forties or fifties; in this case, their physiological age is actually quite old, and they should adjust their lifestyle in time, play less with their phones and exercise more.
Others may be advanced in years, yet their kidney condition remains very youthful, giving others the impression of being vigorous and robust.
Yang Hao, after taking the Kidney-Strengthening Potion, now belongs to the latter category; his kidney function returned to its peak, and he felt very energetic.
Therefore, when it was after ten o'clock, he couldn't sleep, but at this moment, he had to lie down even if he couldn't catch a wink...
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