Blood pressure 140/90mmHg is mild hypertension, i.e. clinical class I hypertension.1 For patients with mild hypertension, non-pharmacological treatment is recommended, such as diet control and low salt and low fat diet, with less than 6g of salt per day, and less animal offal and fatty foods. For exercise, it is recommended that patients take a walk or jog for about 30-40 minutes after meals. Find and remove the causes of hypertension, such as many people are now in a subhealthy state, to relieve the pressure of work and life, and good at regulating their own mentality, as well as avoid staying up late to ensure adequate sleep and rest. 2, after the above factors are controlled, if the patient’s blood pressure is still greater than 140/90mmHg, and there is a trend of persistent elevation, only then consider using antihypertensive drugs for patients. The patient’s blood pressure is still greater than 140/90mmHg and there is a tendency of persistent elevation, then the patient should be considered to use blood pressure lowering drugs. Before the use of antihypertensive drugs, a comprehensive examination should be conducted to exclude whether the patient has a combination of secondary hypertension. For example, hypertension caused by secondary diseases such as primary aldosteronism and Cushing’s syndrome. Only after secondary hypertension is ruled out can the selection and treatment of antihypertensive drugs be individualized based on the fluctuation of blood pressure, the duration and the range of fluctuation.