Experimental
DrugDrug: Sintilimab, 200mg IV D1 Q3W, Cisplatin, 75mg/m2 D1 IV Q3W or Carboplatin AUC 5 D1 IV Q3W, Paclitaxel or Paclitaxel liposome 135-175mg/m2 D1 IV Q3W(Squamous) Drug: Sintilimab, 200mg IV D1 Q3W, Cisplatin, 75mg/m2 D1 IV Q3W or Carboplatin AUC 5 D1 IV Q3W, Pemetrexed, 500mg/m2 D1 IV Q3W(adenocarcinoma) Radiation:Adaptive radiotherapy with V20<20%: 1.PGTV60-66Gy/2.0-2.2Gy/30F;PTV54Gy/1.8Gy/30F;2.PGTV54-66Gy/2.0-2.2Gy/30F;3.PGTV50Gy/2.0Gy/25F