Inclusion Criteria:
1. . Aged between 18-75, male or female;
2. . With confirmed PA diagnosis (screening positive and at least one confirmatory test is positive); NOTE: Screening positive was defined as plasma aldosterone-to-renin ratio (ARR)
≥ 20(pg/ml)/(μIU/ml) or ARR≥30(ng/dL)/(ng/ml/hr). Plasma aldosterone concentration (PAC) post captopril challenge test (CCT) ≥ 110 pg/ml or PAC post seated saline infusion test (SSIT) ≥ 80 pg/ml was considered positive. Note: ARR≥10(pg/ml)/(μIU/ml) or ARR≥15(ng/dL)/(ng/ml/hr) can be considered positive if the patients with hypokalemia (serum potassium \< 3.5mmol/L) or adrenal nodules (diameter \> 1cm).
3. . Not taking any antihypertensive drugs or on a stable regimen of antihypertensive agents(Limited to alpha-adrenergic receptor blockers and calcium channel blockers.) for more than four weeks before screening;
4. . With a mean seated office SBP≥140 or DBP≥90 mmHg;
5. . Able and willing to give informed consent for participation in the clinical study;
Exclusion Criteria:
1. Has a plan to conduct PA subtype classification(eg. Adrenal vein sampling, PET-CT) in 3 months；
2. Has planned surgery within 3 months;
3. With a mean seated office SBP ≥ 180mmHg or DBP ≥ 110mmHg before randomization; Note: Mean seated BP is defined as the average of 3 seated BP measurements at any single clinical site visit. If the patient did not take their regularly scheduled antihypertensive medications prior to the visit, 1 BP re-test is allowed within 2 days after taking the medications.
4. Night shift workers;
5. Has a body mass index(BMI) ≥30 kg/m2 at screening;
6. Has uncontrolled diabetes with fasting blood glucose(FBG)≥13.3mmol/L at screening;
7. Has uncontrolled chronic diseases;
8. Has known other secondary hypertension (eg, renal artery stenosis, Cushing's syndrome, pheochromocytoma, or aortic coarctation) except subclinical Cushing's syndrome;
9. Has known and documented heart failure (New York Heart Association (NYHA) class III or IV), liver transaminase levels were more than 2 times higher than the upper limit of normal;
10. Has had CABG or other major cardiac surgery (eg, valve replacement), peripheral arterial bypass surgery, or PCI within 6 months before Screening;
11. Has had a stroke, transient ischemic attack, hypertensive encephalopathy, acute coronary syndrome, or hospitalization for heart failure within 6 months before screening;
12. Has poor compliance that can not fully participating in the study;
13. Has hyperkalemia with serum potassium \> 5.0mmol/L without potassium supplementation;
14. Has a history of uncontrolled malignant tumor;
15. Has more than 20mmHg difference of seated office SBP in both arms;
16. Is not willing or not able to stop taking sex hormones, glucocorticoids, non-steroidal anti-inflammatory drugs, cyclosporine, tacrolimus, or antidepressants;
17. Is pregnant, breastfeeding, or planning to become pregnant during the study;
18. Complicated with severe mental illness;
19. Has had prior solid organ transplant and/or cell transplants;
20. Has a history of allergy to Finerenone or spironolactone;
21. Has typical consumption of ≥15 alcoholic drinks weekly. Note: 1 drink of alcohol is equivalent to 360ml beer, 45ml spirits, or 150ml wine;
22. Has participated in another clinical study involving any investigational drug within 30 days prior to screening；
23. Female of childbearing potential refuses to use non-hormonal contraception methods during the study period;
24. Refuse to stop eating grapefruit or grapefruit juice during treatment with Finerenone;
25. Other situations that the investigator assesses the subject as unable to complete the trial.
