Clinical Trial in Chinese Healthy Volunteers of GB222

1. Subjects who voluntarily participated in the clinical study and sign the informed consent form;
2. Healthy male adult volunteers aged 18 to 45 years;
3. The subjects have qualified physical examination within 28 30 days before the study, the body mass index (BMI) is within the range of 19.0\~24.0, 50kg for males³ and 45kg for females³, the body weight of males and females is not more than 75kg (inclusive);
4. The subjects agree and adopt reliable contraceptive methods to ensure that they have no pregnancy plain from the beginning of the study to 6 months after the end of this study;
5. Based on physical examination, medical history, vital signs, electrocardiogram, etc., the researchers determined that the body condition of participant was good;
6. The subjects can well communicate with the investigators and complete the study as required by the study.

Exclusions：

1. Allergic constitution; known allergic to the components of the investigational product or allergy history to any drug or food or pollen; subjects who have abnormal serum immunoglobulin E (IgE);
2. Any current signs and symptoms or abnormalities in laboratory tests may indicate acute or subacute infection (fever, cough, urination, pain, abdominal pain, diarrhea, skin infection, wound, etc.)
3. History of drug addiction or drug abuse; subjects with positive urine drug screening;
4. Clear medical history of central nervous system, cardiovascular, renal, hepatic, gastrointestinal, respiratory, metabolic system or other significant diseases; medical history of hypertension or screening systolic blood pressure³ of 140mmHg and/or diastolic blood pressure³ of 90mmHg,which are clinically significant at the discretion of the investigators;
5. People with malignant tumors;
6. Participated in other clinical studies within 3 months before enrollment, or subjects who received drugs which are known to injure the major organs within 3 months before enrollment;
7. Blood donation within 3 months before enrollment;
8. Surgery operation within 3 months before enrollment;
9. Use of prescription drugs or non-prescription drugs within 14 days before enrollment;
10. ALT or AST\>1.5 ULN, Cr\>ULN;
11. Hematology test: WBC\<3.0×10 9 /L or \> 9.5×10 9 /L; ANC \< 1.5×10 9 /L; PLT\<100×10 9/L; HGB\<104 g/L,conform to any of these items;
12. Any of the following is positive: hepatitis B surface antigen (HBsAg), hepatitis C antibody (HCV-Ab), acquired immunodeficiency syndrome antibody (Anti-HIV) and anti-treponema pallidum antibody (TP-Ab);
13. Subjects who have positive anti-drug antibody (ADA);
14. Positive tumor marker (CEA、AFP、PSA、CA-125);
15. Abnormal coagulation function, which is judged by the researcher to be clinically significant;
16. Patients with a previous history of digestive tract ulcer, cerebrovascular accident, vascular lesions, etc., currently have open wounds of skin and mucosa. The researchers considered that other volunteers with risk of bleeding or coagulation should not be included in the study
17. Patients with a history of mental illness.