Herbs that Relieve Food Stagnation

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Besides reducing food stagnation, what is another important action of Lai Fu Zi (raphani semen)?
Lai Fu Zi directs Lung qi downward and transforms phlegm. This is used in the formula San Zi Yang Qin Tang (three seed decoction to nourish ones parents) alongside Bai Jie Zi and Zi Su Zi.

Source: Bensky, D. (2004). Chinese Herbal Medicine: Materia Medica. Seattle, WA: Eastland Press. pp. 503 [Q863]