In the title, San Zi Tang should be San Zi Nourishing Relatives Tang, and its specific formula and dosage is 9g each of white mustard seed, perilla seed, and lycopodium seed. Three Sons Nourishing Family Soup is composed of white mustard seed, perilla seed and lycopodium seed. Among them, white mustard seed warms the lungs and resolves phlegm, induces qi and disperses knots; perilla seed lowers qi and resolves phlegm, relieves cough and calms wheezing; and lycopodium seed eliminates food stagnation (promotes digestion of food) and lowers qi to dispel phlegm. The main treatment for phlegm congestion, gas reversal and food stagnation, symptoms such as coughing and wheezing, phlegm and chest congestion, food is difficult to eliminate. It should be noted that this formula is a symptomatic agent, should not be taken for a long time, and qi deficiency should not be used alone, the specific preparation and use of drugs should also be under the guidance of the physician to identify the evidence, not blindly self-medication.