The purpose of this study is to compare the pharmacokinetics of the two different PEG-rhGH preparations after a single administration.

Inclusion Criteria:

• Healthy male aged ≥18 years old and≤45 years old;
• The Body mass index (BMI): 19-26 kg/m2 (inclusive), and body weight ≥50 kg;
• Normal results of physical examination, vital signs, laboratory tests, 12 lead-ECG, chest X-ray, abdominal ultrasound, or non-clinical significance changes in the assessments above.

Exclusion Criteria:

• Subjects with a history of hypersensitivity reactions or clinically significant hypersensitivity reactions to drugs containing;
• Subjects with a clear history of disorders of the central nervous system, cardiovascular system, digestive system, respiratory system, urinary system, blood system, metabolic system, etc., or other diseases deemed unsuitable for participation in the trials by the investigators;
• Subjects with severe infection, severe trauma, or major surgery prior to screening;
• Subjects who have received blood transfusions, had blood donors, or lost blood before screening;
• Subjects who have positive results of human immunodeficiency virus antibodies (HIV-Ab), or hepatitis B surface antigen (HBsAg), or hepatitis C virus antibodies (HCV-Ab), or syphilis specific antibodies (TPPA);
• Subjects who have participated in clinical trials for medication or medical device prior to screening;etc.