IBI310 in Combination With Siltilimab in Subjects With Anti-PD-1/PD-L1 Resistance R/M NPC

(IBI310 3 mg/kg IV d1, Q3W combined with sintilimab 100 mg IV d1, Q3W) or( IBI310 1 mg/kg IV d1, Q3W combined with sintilimab 200 mg IV d1, Q3W) for up to 4 cycles, and then sintilimab 200 mg IV d1, Q3W until progressive disease, intolerable toxicity, start of a new antitumor treatment, withdrawal of informed consent, loss to follow-up, death or other situations requiring termination of treatment specified in the protocol, whichever occurs first.

(IBI310 3 mg/kg IV d1, Q3W combined with sintilimab 100 mg IV d1, Q3W) or( IBI310 1 mg/kg IV d1, Q3W combined with sintilimab 200 mg IV d1, Q3W) for up to 4 cycles, and then sintilimab 200 mg IV d1, Q3W until progressive disease, intolerable toxicity, start of a new antitumor treatment, withdrawal of informed consent, loss to follow-up, death or other situations requiring termination of treatment specified in the protocol, whichever occurs first.