Experimental: Induction chemotherapy and Toripalimab

Induction chemotherapy TP regimen combined with Toripalimab for 3 cycles: Toripalimab 240mg d1, Paclitaxel 175mg/m2 d2 or Nab-Paclitaxel 260mg/m2 d2，Cisplatin 25mg/m2 d2-4 q3w.~Response rate of primary tumor is evaluated using laryngoscopy and head and neck MRI after 3 cycles of induction therapy. If ORR of primary tumor is CR/PR, then chemoradiation is conducted, followed by maintenance therapy of Toripalimab for 8 cycles (6 months). Otherwise, surgery is conducted (laryngeal preservation surgery is preferred), followed by adjuvant radiation/chemoradiation and then maintenance therapy of Toripalimab for 8 cycles.