Exclusion criteria:
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The patients with any of the following conditions could not be included in this trial:
1. Patients with chronic bronchitis, chronic obstructive pulmonary disease, bronchiectasis, asthma, lung cancer, tuberculosis, pneumonia, lung abscess and chest X-ray showing pulmonary inflammatory lesions and other respiratory diseases;
2. Patients with serious primary diseases of cardiovascular, cerebrovascular, pulmonary, renal and hematopoietic systems; diabetic patients; patients with abnormal ECG and clinical significance;
3. Patients who smoke;
4. Patients using ACEI drugs;
5. Patients with body temperature >= 38.5 degrees C;
6. Patients with liver function test value (ALT, AST) exceeding 1.5 times of the upper limit of normal value; SCR higher than the upper limit of normal reference value, or / and BUN higher than 1.5 times of the upper limit of normal value, or / and UA higher than 1.5 times of the upper limit of normal value; WBC less than 3.0 x 10^9 / L or greater than 10.0 x 10^9 / L, and / or neutrophil percentage > 80%; fasting blood glucose greater than or equal to 6.9 mmol / L; and;
7. Patients who have used other drugs to treat the disease after onset (including antibiotics, expectorants, antitussive drugs, systemic or inhaled sex hormones, inhaled bronchodilators, Xinliang jiebiao, Qingre Jiedu and other related traditional Chinese Medicine);
8. Pregnant, lactating women and subjects with pregnancy plans in the last 3 months;
9. Subjects with allergic constitution or allergic to known components of the drug;
10. Patients with serious diseases (such as tumor, etc.) and psychosis that affect their survival;
11. Patients who have participated in clinical trials of other drugs within one month and are currently participating in clinical trials of other drugs;
12. The researchers believe that there are patients who are not suitable for inclusion.
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