Eligibility Criteria:
Inclusion Criteria:
* Agree to all the purposes of the study by signing and dating the informed consent.
* Male, aged between 18 and 40 years, age disparity of each group should less than 10 years.
* Body weight ≥ 50kg, and body mass index (BMI) between 18 kg/m2 and 26kg/m2 at screening.
* Hemoglobin between 131g/L and 162g/L, hematocrit between 41% and 49%, and reticulocyte between 0.5% and 2%.
* Transferrin saturation and serum ferritin are in the normal range.
* Physical condition: vital signs, physical examination and laboratory tests ( including routine blood, biochemical tests, coagulation indicators, serum folic acid, vitamin B12, urine test, HBsAg, anti-HCV, anti-HIV, Immunoglobulin (IgA, IgM, IgG), thyroid function (T3, T4, TSH), autoantibodies), chest-X-ray, 12-lead ECG should all in normal range, or without significant clinically abnormal.
Exclusion Criteria:
* Presence of organic disease in heart, liver, kidney, brain; or presence of cardiovascular, pulmonary, gastrointestinal, urinary, neurological, endocrine, immunity, genitourinary or other systems disease.
* Subjects with familial genetic disease, mental illness, or physical disability.
* History of drug allergy.
* Orthostatic hypotension, systolic blood pressure \<90mmHg.
* Habitual medication, including Chinese herbal medicine.
* Poor inclusion conditions (e.g. infirm).
* Smoker (smoke everyday or more than 7 cigarettes per week),alcoholics (more than 40g/day, equivalent to 100ml/day of 50 degree of white spirit).
* Participate in any other drug trials as the subjects within the previous 3 months.
* As blood donated within the previous 3 months, or experienced massive blood loss due to trauma or surgery.
* Other conditions which in the opinion of the investigator precluding enrollment into the study (e.g. poor compliance).