Multicenter, Platform-type Clinical Study of Refractory/Recurrent Acute Myeloid Leukemia

Inclusion Criteria: * 1\. Patients with acute myeloid leukemia (except for acute promyelocytic leukemia) diagnosed by bone marrow cell morphology, immunology and genetics above are classified according to the French-British-American Collaboration diagnostic criteria (FAB criteria) and the World Health Organization diagnostic criteria (WHO2016 criteria). 2\. Meet criteria for refractory/recurrent AML (except APL). The recurrence was morphological recurrence, excluding molecular recurrence. Except for simple extramedullary leukemia. 3\. Age and gender are not limited. 4. Informed consent must be signed before the start of the study procedure, and the informed consent must be signed by the patient himself or his immediate family if he is 18 years old and above; For young patients under the age of 18, the legal guardian shall sign the informed consent. Considering the patient's condition, if the patient's signature is not conducive to the treatment of the condition, the informed consent shall be signed by the legal guardian or the patient's immediate family. Exclusion Criteria: 1. Concurrent malignant tumors of other organs (patients requiring treatment). 2. Participants considered unsuitable for inclusion by the researchers.