...phase 3 trial was done at 52 centres across China and included patients...EGFR-mutated non-squamous NSCLC...Patients were randomly assigned (1:1:1), using an interactive web response system, to receive sintilimab (200 mg) plus IBI305 (15 mg/kg) plus pemetrexed (500 mg/m2) and cisplatin (75 mg/m2), sintilimab plus chemotherapy, or chemotherapy alone on day 1 of each 3-week cycle for four cycles, followed by maintenance therapy of sintilimab, IBI305, and pemetrexed....Sintilimab plus chemotherapy significantly improved progression-free survival compared with chemotherapy alone (median 5·5 months [95% CI 4·5–6·1] vs 4·3 months [4·1–5·3]; hazard ratio [HR] 0·72 [95% CI 0·55–0·94]; two-sided p=0·016).