Y-shape pegylated somatropin (Xiamen Amoytop Biotech)

1. Evaluate the relative bioavailability of 4.0 mg/mL and 10.0 mg/mL formulations of Yipei growth hormone injection in healthy subjects after single subcutaneous injection; 2. Evaluate the pharmacokinetic (PK) characteristics and immunogenicity of 4.0 mg/mL and 10.0 mg/mL formulations of Yipei growth hormone injection in healthy subjects; 3. Evaluate the safety of 4.0 mg/mL and 10.0 mg/mL formulations of Yipei growth hormone injection in healthy subjects;