SHR-1701 in Metastatic or Locally Advanced Solid Tumors

Inclusion Criteria: * Male or female subjects aged between 18 and 75 years * Life expectancy \>= 12 weeks as judged by the Investigator * Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 * Has measurable disease per RECIST 1.1 * Subjects with confirmed metastatic or locally advanced solid tumor (histologically or cytologically) and there is no known effective anti-tumor treatment (refractory or relapsed from standard treatment). * Adequate hematological, hepatic and renal function as defined in the protocol * Females of childbearing potential (FOCBP), who are not surgically sterile or postmenopausal, must conduct pregnancy test (serum or urine) within 7 days before enrollment, and must not be pregnant or breast-feeding women. If the result is negative, she must agree to use adequate contraception during the experiment and 3 months after the last administration of the test drugs. And non-sterilized males who are sexually active must agree to use adequate contraception during the experiment and 3 months after the last administration of the test drugs. * Able to understand and sign an informed consent, and able to comply with all procedures Exclusion Criteria: * Anticancer treatment within 28 days before the first dose of study drug * Major surgery within 28 days before start of trial treatment (prior diagnostic biopsy is permitted) * Systemic therapy with immunosuppressive agents within 7 days prior to the first dose of study drug; or use any investigational drug within 28 days before the start of trial treatment * With any active autoimmune disease or history of autoimmune disease, including but not limited to the following: hepatitis, pneumonitis, uveitis, colitis (inflammatory bowel disease), hypophysitis, vasculitis, nephritis, hyperthyroidism, and hypothyroidism, except for subjects with vitiligo or resolved childhood asthma/atopy. Asthma that requires intermittent use of bronchodilators or other medical intervention should also be excluded * Subjects with active central nervous system (CNS) metastases causing clinical symptoms or metastases that require therapeutic intervention are excluded * Clinically significant cardiovascular and cerebrovascular diseases, including but not limited to severe acute myocardial infarction within 6 months before enrollment, unstable or severe angina, Congestive heart failure (New York heart association (NYHA) class \> 2), or ventricular arrhythmia which need medical intervention. * History of immunodeficiency including seropositive for human immunodeficiency virus (HIV), or other acquired or congenital immune-deficient disease, or any active systemic viral infection requiring therapy, e.g., hepatitis B or C * Previous malignant disease (other than the target malignancy to be investigated in the trial) within the last 2 years. Subjects with history of cervical carcinoma in situ, superficial or non-invasive bladder cancer or basal cell or squamous cell cancer in situ previously treated with curative intent are NOT excluded. * Receipt of any organ transplantation, including allogeneic stem-cell transplantation