FCN-338 in Combination With Azacitidine or Chemotherapy in Myeloid Neoplasms

Inclusive Criteria 1. Age ≥18 years. 2. Cohort A: Patients diagnosed with R/RAML (≥5% blasts in the bone marrow) according to the WHO 2016 criteria \[excluding acute promyelocytic leukemia (APL) and BCR-ABL positive AML\], meeting any of the following definitions: 1\) Relapsed AML: Reappearance of leukemic cells in peripheral blood or ≥5% blasts in bone marrow after complete remission (CR, CRi) (excluding other causes such as bone marrow regeneration after consolidation treatment) or infiltration of leukemic cells outside the marrow; 2) Refractory AML: Ineffective after two cycles of standard treatment; Relapsed within 12 months after CR followed by consolidation treatment; Relapsed after 12 months but ineffective with standard chemotherapy; Relapsed two or more times; With persistent extramedullary leukemia. 3\. Cohort B: Patients diagnosed with 1L fit AML according to the WHO 2016 criteria \[excluding acute promyelocytic leukemia (APL) and BCR-ABL positive AML\]. 4\. Eastern Cooperative Oncology Group (ECOG) performance status score of 0-2. 5. Expected survival time ≥ 3 months. 6. Adequate bone marrow and organ function. Exclusive Criteria 1. Patients with diagnosis of APL or BCR-ABL-positive AML patients or a history of prior myeloproliferative disease (MPN). 2. With known leukemic infiltration of the central nervous system. 3. Have received allogeneic hematopoietic stem cell transplantation or overt immune cell therapy, or autologous hematopoietic stem cell transplantation within 1 year. 4. Have active fungal, bacterial and/or viral infections including, but not limited to, active Human Immunodeficiency Virus (HIV), viral hepatitis B or C.