Camrelizumab Plus Famitinib as Treatment in Patient With Advanced or Metastatic Pulmonary Sarcomatoid Carcinoma

Inclusion Criteria: * Patients with histologically stage IIIB, IIIC, IV Pulmonary Sarcomatoid Carcinoma according to WHO criteria or diagnosed with non-small cell lung cancer with sarcomatoid carcinoma component (sarcomatoid component tumour cells can be spindle cells, and/or giant cells and/or heterogenous sarcomatous differentiation including rhabdomyosarcoma, chondrosarcoma, etc.) ； * Has no prior systemic therapy; (chemotherapy and/or radiotherapy is allowed as part of neoadjuvant/adjuvant therapy. Patients who have had recurrence or metastasis for more than 6 months from the end of neoadjuvant/adjuvant treatment would be enrolled ) ； * Patients must have at least one measurable lesion according to RECIST 1.1 ； * ECOG score 0-1 ； * Agree to provide tumour tissue samples for biomarker exploration (including but not limited to PD-L1 IHC or NGS testing) ； * Life expectancy more than 3 months; * Has adequate organ function； Exclusion Criteria: * Imaging (CT or MRI) showed tumor invasion of major vessels. hemoptysis ≥ 2.5 mL within 1 month before the first dose; * Patients with EGFR-sensitive mutation (19Exondel/L858R), ALK, ROS1 gene rearrangement or fusion, BRAFV600E mutation, MET gene exon 14 skipping mutation; * Patients with active bleeding or bleeding tendency ； * With hypertension that cannot be reduced to the normal range after antihypertensive drug treatment (systolic blood pressure ≤ 140 mmHg/diastolic blood pressure ≤ 90 mmHg)； * Urine protein ≥ (+ +), and 24-hour urine protein ≥ 1.0g; * Presence of thrombotic disorder requiring anticoagulant therapy with warfarin or heparin, or requiring antiplatelet therapy (aspirin ≥ 300 mg/day or clopidogrel ≥ 75 mg/day) ； * Has multiple factors affecting the absorption of oral drugs, such as inability to swallow, nausea and vomiting, chronic diarrhea and intestinal obstruction * Has active central nervous system (CNS) metastases confirmed by CT or MRI * Subjects diagnosed immunodeficiency or receiving systemic glucocorticoid therapy or any other form of immunosuppressive therapy of non-related tumor within 7 days before the first dose; allowed physiological dose of glucocorticoid (≤10 mg/day Prednisone or equivalent); * Has active hepatitis B ; * Has severe infections within 4 weeks of the first dose of study treatment ; * Women who are pregnant or lactating ; * With grade II or above myocardial ischemia or myocardial infarction and poorly controlled arrhythmias (QTc interval ≥ 450 ms for males and QTc interval ≥ 470 ms for females). Subjects with grade III-IV cardiac insufficiency or with left ventricular ejection fraction (LVEF) less than 50% according to NYHA criteria; * Has known history of Human Immunodeficiency Virus (HIV)； * Has known allergy to Camrelizumab, or famitinib or any of accessories ;