After admission, the following examinations should be performed: routine blood tests, urine routine, stool routine + occult blood, liver and kidney lipid profile, 24h urine K, Na, Cl (preferably on the same day when blood potassium is low), blood group, Rh factor, PT + A, hepatitis B five, hepatitis C antibody, HIV-Ab electrocardiogram chest X-ray frontal hepatobiliary pancreatic and spleen ultrasound, blood pressure + heart rate (prone position) tid, day and night urine volume: endocrine examination: blood gas (when blood K is low) 3hOGTT (blood Glu, K, Na×5, blood insulin×5, urine K, Na, Cr×5), 24hUFC, 24h urine CA Prone aldosterone test: the day before the test, keep 24h urine K, Na, Cl, the next day to perform prone aldosterone test (the patient fasted overnight on the test day, starting at 4AM to maintain the prone position, 8AM prone blood to measure blood K, Na, Cl, Ald, P Na, Cl, Ald, PRA and AII; then 40mg or 0.7mg/kg of tachyphylaxis (total amount of tachyphylaxis <40mg) was injected into the blood for 2 hours in standing position, and Ald, PRA and AII were measured in the standing position at 10AM. Avoid taking diuretics, ACEI, ARB, β-receptor antagonists, and Antiseptic before the test. If the above drugs are used, the aldosterone test should be stopped for 1-2 weeks before doing the standing aldosterone test, depending on the condition of the patient, and decide whether to apply cardiac pain. The day before the test, 24h urine K, Na and Cl will be taken, and the next day the test will be performed (on the test day, the patient will fast overnight, stay in the prone position from 4AM, blood pressure will be measured at 8Am, blood K, Na and Cl, ALD, PRA and ATII will be measured in the prone position, oral Kepone 25mg will be taken, blood pressure will be measured at 10AM after 2 hours of sedation and ALD, PRA and ATII will be measured after taking the drug). If necessary: A-2, sex hormones, blood F, ACTH Adrenal glands: CT of both adrenal glands (plain scan + enhancement + coronal and sagittal reconstruction) Hypertension complication examination: fundus, UCG, 24h urine protein quantification Carotid artery, both renal arteries, lower limb arteries BUS