Gastric Cancer Marker Detection and Its Kit Development

Inclusion Criteria: patient 1. Age is greater than or equal to 18 years old (including 18 years old); 2. Patients who are diagnosed with cancer after pathological diagnosis; 3. Can provide enough tissue samples; 4. Have not received anti-tumor treatment in the past; 5. Comply with the principle of informed consent and sign the informed consent form. healthy person: 1. Age is greater than or equal to 18 years old (including 18 years old); 2. No underlying disease; 3. Can provide enough tissue samples; 4. Comply with the principle of informed consent and sign the informed consent form. Exclusion Criteria: 1. The tumor foci cannot be clearly derived from a specific tumor type; 2. Those who have a history of other tumors, autoimmune diseases and allergies; 3. Previously received anti-tumor treatments such as surgery, chemotherapy, radiotherapy, molecular targeted therapy, immunotherapy, biological therapy or Chinese medicines with anti-cancer and anti-tumor effects in the instructions; 4. Participated in any clinical trial within 90 days before the experiment; 5. Received major surgery within 90 days before the experiment; 6. Received bone marrow transplantation 90 days before the experiment; 7. Subjects who may not be able to complete the study due to other reasons or who are determined by the investigator to be unsuitable to participate in this study.