A Study of Simmitinib Versus Chemotherapy for Participants With Advanced Oesophageal Squamous Cell Carcinoma

Who may be able to join

• 1. Have fully understood and voluntarily sign the ICF for this study; 2. Age of 18-75 years (inclusive), male or female； 3. Histologically or cytologically confirmed esophageal squamous cell carcinoma with locally advanced unresectable, local recurrence or with distant metastasis； 4. Second-line patients with disease progression after only first-line standard therapy（Standard treatment: Chemotherapy with platinum, paclitaxel, or fluorouracil combined with immunosuppressive regimen. Progression during maintenance therapy will be allowed.Concurrent chemoradiotherapy with recurrence or metastasis after surgery is considered as first-line treatment. Progression during Concurrent chemoradiotherapy/ adjuvant/neoadjuvant therapy or within 6 months of the last dose is considered a first-line standard treatment failure）; 5. At least one evaluable lesion according to RECIST 1.1; 6. Eastern Cooperative Oncology Group (ECOG) performance status (PS) score of 0-1; 7. Expected survival is more than 3 months； 8. Have recovered from any prior adverse effects of chemotherapy, surgery, radiation, or other antitumor therapy to CTCAE V5.0 criteria ≤ Grade 1 or baseline (except for toxicity such as hair loss that the investigator determines is not a safety risk)； 9. Adequate organ function, defined as:
• Absolute Neutrophil count (ANC) ≥ 1.5 × 10^9/L;
• Platelet count (PLT) ≥ 100× 10^9/L;
• Hemoglobin (Hb) ≥ 90 g/L;
• Serum creatinine ≤ 1.5 × ULN and Creatinine clearance (CCr)≥60mL/min(According to the Cockcroft-Gault formula);
• Serum total bilirubin (TBIL) ≤ 1.5 × ULN;
• Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤ 2.5 × upper limit of normal (ULN) (≤ 5.0 × ULN for patients with liver metastases);
• Prothrombin time (PT)、activated partial thromboplastin time (APTT)、international normalized ratio(INR)≤1.5 × ULN(No previous anticoagulant therapy) 10. Male and female patients of childbearing age must agree to take effective contraceptive measures during treatment and within 6 months after the last dose of treatment. Female participants must have a negative serum or urine pregnancy test result within 7 days prior to randomization and must be non-lactating.