2）Pharmacokinetic Studies of Azilsartan Tablets with Multiple-dose oral administration Subjects in Group I will take 20mg Azilsartan orally once daily for 7 day (day 3~day 9) after completing the last time blood sample collection (in day 2, 48h) of the first time administration (day 1). 5mL blood sample will be collected from vein on day 7, day 8 and day 9 for measuring minimum observed concentration before drug administration. On day 9, after administration, blood sampling time is the same as single-dose administration study. Blood sampling time: 0h (before administration starting), 0.25, 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, 16, 24, 36, 48h after administration. 5ml whole blood from cubital vein will be placed in a heparinized tube and centrifuged. Duplicated plasma A and B will be taken and kept in low temperature.