Strengthening vital qi is to increase body resistance. Since victory or failure in the struggle between vital qi and pathogens determines the aggravation or alleviation of a disease, one of the important principles in clinical treatment is to change the relative strength of vital qi and pathogens. In so doing, the disease will take a turn for the better.

Eliminating pathogens means getting rid of pathogenic factors to facilitate and recover the strength of vital qi. Therefore, eliminating pathogens, like strengthening vital qi, is also one of the important principles clinically.

They have the following methods: driving out pathogens first and then strengthening vital qi, strengthening vital qi first and then eliminating pathogens and strengthening vital qi and eliminating pathogens simultaneously.

Strengthening vital qi and eliminating pathogens supplement each other: the former helps the elimination of pathogenic factors and the latter helps strengthening vital qi. So, clinically, they should be applied in the light of the variations of the cases.

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