Study of Surufatinib as Second-line Treatment in Patients With Biliary Tract Carcinoma

Inclusion Criteria: 1. Provision of written Informed Consent Form (ICF) prior to any study specific procedures 2. Aged at least 18 years 3. Histologically or cytologically confirmed advanced BTC that was surgically unresectable or metastatic, including extrahepatic cholangiocarcinoma (EHCC), intrahepatic cholangiocarcinoma (IHCC) or gallbladder biliary carcinoma (GBC) 4. First-line prior treatment of cytotoxic chemotherapy, treatment failure or intolerable toxicities 5. ECOG 0-1 6. Patients must have measurable lesions Exclusion Criteria: 1. Anti-tumor therapy received within 4 weeks prior to initiation of study treatment 2. Previous therapy with approved or investigational anti-VEGF (or VEGFR) tyrosine kinase inhibitors or monoclonal antibody 3. Liver metastases ≥50% of liver volume 4. Child-Pugh classification score of liver function\> 7 5. History or presence of a serious hemorrhage (\>30 ml within 3 months), hemoptysis (\>5 ml blood within 4 weeks) or a thromboembolic event (including transient ischemic attack and/or stroke events) within 12 months 6. Active malignancy (except for definitively treated basal or squamous cell carcinoma of the skin, or carcinoma in-situ of the cervix) within the past 5 years 7. Patients receive CYP3A4 potent inducer or inhibitors within 2 weeks 8. Pregnancy ( positive pregnancy test before the first dose of study treatment) or lactating women