There is no such thing as the best tea substitute for expectorant and phlegm elimination, but you can make a tea substitute for traditional Chinese medicines such as tangerine peel, Szechuan Pei Mu, loquat leaf, etc., which has the effect of expelling phlegm and eliminating phlegm. However, the effective dosage of the tea substitute is limited and generally cannot achieve a good therapeutic effect. If you feel unwell, it is recommended to take regular treatment under the guidance of a doctor. Chenpi is bitter, pungent and warm in nature, it can regulate qi and strengthen the spleen (regulate qi and strengthen the spleen), dry dampness and resolve phlegm (dispel phlegm in the body with dampness-drying medicines), and improve the symptoms of distension and fullness of the epigastrium (abdomen), poor appetite and vomiting and diarrhea, coughing with excessive phlegm in phlegm-damp body. Szechuan Bei Mu is bitter, sweet and slightly cold in nature, with the effects of clearing heat and moistening the lungs (removing heat to moisturize the lungs), resolving phlegm and relieving cough, dispersing knots and eliminating carbuncles (evacuating knots and eliminating carbuncles and poisons). Clinically, it is often used in the treatment of lung-heat and dry cough, dry cough with little phlegm, and cough with yin deficiency. Loquat Leaf is bitter in flavor, slightly cold in nature, and belongs to the lung and stomach meridians. It has the efficacy of clearing the lungs and relieving cough, lowering the rebelliousness and stopping vomiting (stopping the upward rush of stomach qi, stopping vomiting), and can be used to relieve cough with much sputum, rebellious asthma and gastric heat and vomiting symptoms caused by lung heat. However, it should be noted that there are many reasons for the appearance of phlegm, and only by treating the cause can it be effective in expelling phlegm and resolving phlegm. If the symptoms are more serious, decoction is recommended to enhance the efficacy. Before using the tea substitute, you should consult your doctor to identify the cause of phlegm before drinking it, and do not take it blindly or increase the dosage without authorization.