Single-Arm Exploratory Study of PD-L1 Antibody Plus Neoadjuvant Chemotherapy in Locally Advanced Head and Neck Squamous Cell Carcinoma

1200mg, intravenous infusion, D1， Every three weeks, there are two cycles in total.

TP regimen: Docetaxel 75 mg/m2, intravenous infusion, D1， Cisplatin 75 mg/m2, intravenous infusion, D1， Every three weeks, there are two cycles in total.

Surgery or radiotherapy should be performed 1-4 weeks after the completion of neoadjuvant therapy.