After coming back from Beijing, I found that there is still a big difference between the north and the south. In the north, when a patient has a transient ischemic attack or cerebral infarction, ultrasound or head and neck CTA examination is a test that is not hesitated, because only after the relevant examination, you will know your vascular condition, and only then will you know what you should pay attention to next and what the next treatment plan is. It is a pity that many patients, including many neurologists, are not aware of this problem and continue to treat patients according to their previous treatment plans, knowing nothing about their vascular condition as well as the patients themselves, so how can this be a good secondary prevention! Therefore, patients and neurologists are urged to pay attention to vascular examination.