The chinese subsidiary shanghai longhua hospital , professor hui - yong zhang : " old chronic bronchitis , " which is a very high incidence of the lung disease , the symptoms of recurrent respiratory tract infection , clinical 多 见 cough with sputum , shortness of breath breathing space and time for a long time qi deficiency , fluid yumao , expectoration powerless 上海中医大附属龙华医院呼吸内科张惠勇教授： “老慢支”是一种发病率非常高的肺部疾病，其症状表现为反复呼吸道感染，临床多见咳嗽多痰、喘息气短、时间久了肺气亏虚、津液亏耗、咳痰无力。
