(a) combined with other malignancies; (b) patients underwent any other chemotherapy regimens before, including gemcitabine and oxaliplatin; (c) patients received previous surgical resection or any other interventional procedures besides HAIC, such as transarterial chemoembolization (TACE), 125I seed implantation, radiofrequency ablation, microwave ablation, cryoablation, or percutaneous ethanol injection, etc.; (d) drug (chemotherapy drugs, lenvatinib, or PD-1 inhibitors) allergy; (e) patients with a history of autoimmune diseases; (f) patients with gastrointestinal bleeding of any grade within 4 weeks prior to the integrated treatment; (g) patients with uncontrolled comorbidities (e.g. general infection, serious dysfunction of heart or kidney, acute hepatitis or pneumonia, chronic obstructive pulmonary disease, or recent stroke).