Ji Kang had his own secret of keeping in good health during the Three Kingdoms period. He believes that people can live a long life because they usually pay attention to maintaining themselves in the nuances. This is like "people who insist on irrigation for crops in the soup world will be irrigated and dried up, and the benefits of irrigation cannot be lied about." The way of keeping in good health is similar to this. The key is to practice yourself bit by bit on weekdays, and not to be hurt by worldly desires, so as to be strong and live longer.

Ji Kang believes that the correct way to maintain health should be: a gentleman knows the shape and relies on God to stand, and God keeps the shape, recognizing that reason is easy to lose and knowing its harm is not born. Therefore, cultivate nature and protect the spirit, feel at ease all over, love and hate are not entangled in feelings, worry about happiness and indifference, breathe and breathe, eat for a living, make form and spirit fit, and practice both inside and outside.