Inclusion Criteria:  Fully aware this study and signed the informed consent form in voluntary manner, and willing and able to comply with the study procedure; Age ≥18 years; Histologically diagnosed locally advanced or metastatic Gastric Cancer and Esophagogastric junction adenocarcinoma MET gene amplifications Cohort 1: Having measurable lesions (in accordance with RECIST 1.1 criteria); Cohort 2: having evaluable lesions Eastern Cooperative Oncology Group (ECOG) Performance Status 0 to 2 Survival is expected to exceed 12 weeks; Adequate functionality in bone marrow, liver, kidney Able to take or swallow the drug orally. Female patients of childbearing potential must agree to use effective contraceptive methods from screening period to 30 days after discontinuation of the study drug,The male patients whose sexual partners are women of childbearing age must use condom during sexual intercourse during the study and within 6 months after discontinuation of study drug;  Exclusion Criteria:  Currently having other malignant tumors, or having other infiltrating malignant tumors in the past 5 years. Stage I malignant tumor after radical treatment for at least 3 years, except those considered by investigators to have small possibility of recurrence. Patients with radically treated carcinoma in situ (non-infiltrating) and skin cancer other than malignant melanoma can be enrolled; Having received antitumor therapy (including chemotherapy, hormone therapy, biotherapy, immunotherapy or traditional Chinese medicine for antitumor indication) within 3 weeks prior to the start of study treatment, or having received treatment with small molecular tyrosine kinase inhibitors (e.g., EGFR-TKI) within 2 weeks prior to the start of study treatment;