There will be 4 visits for this study, Informed consent and following study procedures (ACQ-5(asthma control questionnaire), severity assessment) will be done at visit 1. After that, according to clinical practice in China patients usually go to the clinic every 4 weeks. Asthma control status, ACQ-5 and sever exacerbation will be assessed at each clinic visit till 12 weeks (visit 2, 3, 4).