The study is a randomized, Double-Blind, Placebo-Controlled study to evaluate the safety, tolerability and pharmacokinetics, pharmacodynamics of SHR2150.

will consist of 50 healthy subjects, 5 groups. The purpose of this part is to explore the safety, tolerability ,pharmacokinetics and pharmacodynamics of single doses of SHR2150 capsule in healthy subjects.

Inclusion Criteria:

1. Signed informed consent.
2. Aged 18~45.
3. Body weight ≥ 50 kg for male; ≥ 45 kg for female, body mass index (BMI) between 18 to 28 kg/m2 ( Including boundary value) .
4. Vital signs, physical examination, laboratory results are within normal range or considered not clinically significant.
5. Female subjects (including partner) of childbearing potential must be using a medically acceptable form of birth control.

Exclusion Criteria:

1. Currently suffering from cardiovascular, liver, kidney, digestive, nervous, blood, thyroid or mental diseases.
2. Have severe infection, severe trauma or major surgical operations within 3 months. Plan to receive surgery during the trial and within two weeks after the end of the trial..
3. 12-ECG test have clinical significant abnormality or the QT interval (QTc) > 450 ms(male)/QTc)> 460 ms(male) or<300ms(female).
4. Screening for infectious diseases is positive (Including HBsAg, Anti-HCV, TPPA, Anti-HIV)
5. Suspected allergy to any ingredient in the study drug.
6. Have any drug that inhibits or induces liver metabolism within 1 month.
7. Any condition or disease that affects the absorption, metabolism, and/or excretion of the study drug judged by the investigator;
8. Treatment with immunosuppressant or interferon-containing drugs within 6 months of study drug administration;
9. Participated in clinical trials of any drug or medical device within 3 months before screening, or within 5 half-lives before screening;
10. Treatment with live(attenuated) vaccine within 2 months before taking the study drug or during the study or within 1 months after administration;
11. Had donated blood or blood transfusion≥ 200 mL within 1 months before taking the study drug or had donated blood or blood transfusion≥ 400 mL within 3 months prior to screening;
12. The average daily smoking ≥ 5 cigarettes within three months; the average daily alcohol intake in a month exceeds 15 g (15 g alcohol is equivalent to 450 mL beer or 150 mL wine or 50 mL low-alcohol);
13. Keep smoking, drinking alcohol or consuming caffeinated foods or beverages (more than 8 cups, 1 cup = 250 mL) 2 days before taking the study drug and during the study; and those who have special dietary requirements and cannot follow the unified diet;
14. History of drug abuse , drug dependence or drug screening test is positive;
15. Pregnant or lactating women;
16. Other conditions that the investigator believes the subject is not suitable.