Camrelizumab 200mg intravenously 30 - 60 min biweekly; Apatinib mesylate 250mg or 500mg oral daily continuously; The treatment lasts for up to 2 years or until disease progression, death or intolerable toxicity occurred.
This is a study of Camrelizumab combined with Apatinib versus Apatinib alone in the third-line treatment of metastatic gastric cancer. Paticipants will be radomized to receive treatment of Camrelizumab combined with Apatinib or Apatinib alone. The primary study hypothesis is that the adding Camrelizumab to Apatinib can prolong the progressive-free survival of the paticipants.