Almost every doctor should have night shift. The majority have night shift 1-3 times a week. And doctor in some departments , such as surgical department, may have night shift more than 3 times a week. According to some doctors’ experience, they would feel very sleepy when on night shift. In case of that doctors feel insobriety when emergency appears, some choose not to sleep. However, doctors who made this choice are most likely young. According to what my teammate said just now, we can know that a doctor is busy during the day. And as time goes by, not having a rest on night shift will exhaust the doctor. So some experienced doctor will go to the ward to examine the patients first，and then go to sleep. Sometimes doctor is ought to give emergency treatment or to visit the patient with the ambulance. The daily life of a doctor is basically finished —apart from the scientific research. The scientific research is not only a basic skill of a doctor, but also a representative of the medical skill and expertise. What is more, it can assist in curing of new diseases . Take BarryMarshall for example ,…… Nevertheless, nowadays some Chinese doctors do research just for promotion. All right, let us have a look at how they do the scientific research …(for science or for promotion).Because of their busy work, they should do it against time. They read documentation, come up with some new points and do research together with students. They can apply clinical experience to the scientific research, as well as use some scientific payoffs in clinic.