Low Dose Radiotherapy Combined With Sintilimab and Chemotherapy as Neoadjuvant Therapy for Stage II-III NSCLC

Radiation: 30Gy/15F Drug: Sintilimab, 200mg IV D1 Q3W Drug: Cisplatin, 75mg/m2 D1 IV Q3W or Carboplatin AUC 5-6mg/ml/min D1 IV Q3W Drug: Pemetrexed, 500mg/m2 D1 IV Q3W or Albumin paclitaxel 260mg/m2，D1 or 130mg/m2，D1,8 IV Q3W

Drug: Sintilimab, 200mg IV D1 Q3W Drug: Cisplatin, 75mg/m2 D1 IV Q3W or Carboplatin AUC 5-6mg/ml/min D1 IV Q3W Drug: Pemetrexed, 500mg/m2 D1 IV Q3W or Albumin paclitaxel 260mg/m2，D1 or 130mg/m2，D1,8 IV Q3W