In this ongoing, single-arm, phase II study...with histopathologically diagnosed resectable HER2-positive gastric or GEJ adenocarcinoma who had clinical T3/N+ or higher stage. Neoadjuvant combination of SHR1210, transtuzumab and CAPOX is a safe and efficacious treatment option for patients with HER2-positive gastric or GEJ adenocarcinoma.