A phase Id trial was conducted to evaluate the safety of pyrotinib combined with SHR6390 in refractory advanced HER2 positive gastric cancer or solid tumors....The overall ORR was 40.9%, with median PFS and OS of 3.88 (95%CI 3.46, 4.30) and 11.14 (95%CI 4.50, 17.78) months, respectively. Among GC patients (n=18), 16 pts finished efficacy assessment, 8 pts achieved PR (5 pts having prior anti-HER2 regimens) and 7 achieved SD, with ORR and DCR of 50.0% and 93.8%, respectively....Pyrotinib combined with SHR6390 showed acceptable safety profile and encouraging efficacy.