Intervention for High-normal Blood Pressure in Adults With Type 2 Diabetes

Inclusion Criteria: * irrespective of sex; * aged between 45 and 79 years; * with office-measured seated BP 120-139 mm Hg systolic and below 90 mm Hg diastolic; * diagnosed of type 2 diabetes mellitus (T2DM), currently on diabetic therapy; * informed consent provided and long-term follow-up possible Exclusion Criteria: * poor control of blood glucose, HbA1c \> 10.0% * administration of any antihypertensive medications within 1 month; * a history of hypoglycemic coma / seizure; * confirmed diagnosis of type 1 diabetes mellitus; * alanine-aminotransferase (ALT) or aspartate-aminotransferase (AST) over three times the upper limit of normal; * estimated glomerular filtration rate \< 45 ml/min/1.73m2; * a history of congestive heart failure with left ventricular ejection fraction \< 40%; * coronary artery disease requiring RAS blockers for secondary prevention; * acute on-set of stroke within 6 months prior to randomization; * a ratio of urinary albumin (in mg/L) to urinary creatinine (in g/L) (ACR) ≥ 300 mg/g; * known contraindications for the active study medications; * a history of psychological or mental disorder; * pregnancy or currently planning to have babies or lactation; * severe diseases such as severe heart diseases; * an expected residual life span less than 3 years; * a malignancy that clinical investigators consider as unsuitable to participate; * currently participating in another clinical trial.