To Evaluate the Safety and Tolerability of Multiple Doses of GS3-007a Oral Solution in Healthy Subjects.

To Evaluate the Safety and Tolerability of GS3-007a Oral Solution in a Multi-dose, Randomized, Open, Single-center Study in Healthy Chinese Adult Subjects.

To evaluate the safety and tolerability of GS3-007a oral solution after multiple oral administration in Chinese healthy adult subjects.

To evaluate the pharmacodynamic (PD) and pharmacokinetics（PK） characteristics of GS3-007a oral solution after multiple oral administration in Chinese healthy adult subjects

Inclusion Criteria:

• Healthy adult subjects aged 18-45 years (including boundary values), male or female;
• Body mass index: 19-26 kg/m2 (including boundary values), male weight ≥50 kg, female weight ≥45 kg;

Exclusion Criteria:

• (Screening period consultation) accumulated two or more allergies to other drugs, food and environment; Or prone to rash, urticaria and other allergic symptoms; Or are known to be allergic to growth hormone-promoting peptide drugs or excipients of this preparation;
• (screening period) have a clear history of neurological or mental disorders; Persons with incapacity or cognitive impairment;
• ALT and AST exceed the upper limit of the normal range;