RecruitingPhase 1Drug trialNeoadjuvant Camrelizumab With Dalpiciclib for Resectable Head and Neck Squamous Cell CarcinomasThe purpose of this study is to explore the safety and feasibility of anti-programmed cell death protein 1(PD-1) immunotherapy, Camrelizumab, combined with cyclin-dependent kinase 4/6 blockade, Dalpiciclib, as a new neoadjuvant treatment regimen for patients with resectable head and neck squamous cell carcinoma(HNSCC).