This is a national multicenter, prospective, observational study. It is planned to enroll 1215 patients with newly diagnosed essential hypertension in 80 centers, and divide them into 3 groups according to different treatment plans given by doctors: AZL-M monotherapy group, CCB monotherapy group (amlodipine besylate tablets or nifedipine controlled-release tablets) and AZL-M+CCB (amlodipine besylate tablets or nifedipine controlled-release tablets) combined treatment group. Subjects were visited 4 times at baseline, 1 month, 3 months, and 6 months, and the following key indicators of subjects were measured according to the doctor's decision, and the measurement results were collected

Inclusion Criteria:

1. Age ≥ 18 years old (one year old);
2. Patients diagnosed with essential hypertension;
3. Did not receive any antihypertensive drug treatment for at least 3 months before enrollment;
4. Eligible to use 80 mg once-daily AZL-M at baseline or CCB (amlodipine besylate tablets or nifedipine controlled-release tablets) or CCB (besylate Amlodipine tablets or nifedipine controlled-release tablets) + AZL-M 80 mg once-daily combination therapy; Volunteer to participate in this study, understand and sign the written informed consent.

Exclusion Criteria:

1. Used antihypertensive drugs for indications other than hypertension within 3 months before enrollment;
2. Has a history of alcoholism, drug abuse or illegal drug use;
3. Pregnant, breastfeeding women, and those who plan to become pregnant in the near future;
4. Life expectancy is less than one year; Participating in other clinical trials.

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