Xiaoer Malong Zhike Pingchuan Granules

1. To explore the effect of high and low doses of Xiaoer Ma Long Zhike Pingchuan Granules on the improvement of cough symptoms in children with cough variant asthma (phlegm-heat accumulation in the lungs). 2. To explore the effect of different doses of Xiaoer Ma Long Zhike Pingchuan Granules on the improvement of phlegm-heat accumulation in the lungs in children with cough variant asthma and the efficacy of reducing the use of relief medication. 3. To observe the safety of Xiaoer Ma Long Zhike Pingchuan Granules in clinical application.