Patient: Description of the condition (onset time, main symptoms, hospital, etc.): female, born in January 2007, more than one year old, often cold and cough, a cough for ten days and a half months, two years and a month had a pneumonia, two years and seven months after the kindergarten half a month and twenty days on a cold and cough, coughing for a particularly long time, three years old and a pneumonia, last June got hand, foot and mouth, last winter Basically, he had a cold and cough once a month, but he usually got better in three to five days, and did not cough for a long time until January 2011, when he started to have a cold and cough again for about half a month, and since March, he has been having a cold and cough, repeatedly, and has not been able to recover completely. (combined with clinical), the attending physician believes that the child’s weight (35 pounds) height (108 cm) development is relatively normal, should not be precardiac disease, we are not sure, May 13 in the second provincial hospital examination, ultrasound, the remaining chambers of normal size. The septum and left ventricular posterior wall thickness and motion amplitude were not abnormal. The atrial and ventricular septum continuity was not abnormal. The morphology and activity of each valve were not abnormal. CDFI: A continuous left-to-right shunt was seen at the intersection of the main pulmonary artery and the descending aorta. Ultrasound suggests: congenital heart disease – arteriovenous ductus arteriosus. After the examination on May 13, the doctor said one is to operate directly, or observe for six months, and try not to catch a cold during that period, and then check again after six months to see if it can close on its own. Another is to wait for blockage at the age of seven or eight, but the unclosed is only 2 mm, which is not very suitable for blockage. No other treatment was carried out. I would like to know: 1. Is surgery now or observation first? If I do not operate now, what is the possibility of its self-closing; 2. If I do not operate, does it affect the child’s growth and development.