Need. The prevention and control of asymptomatic cerebral infarction focuses on the prevention and control of its risk factors, such as hypertension, diabetes, and hyperlipidemia, etc. In addition to taking medical history to understand personal habits, family history of genetic disease, and history of previous diseases, doctors need to obtain physiological information of patients through laboratory tests, ECG monitoring, blood pressure monitoring, glucose monitoring, and arterial vascular ultrasound, which can be used to assess risks and formulate treatment and prevention treatment and prevention programs.