Biomarker-Guided Allogeneic Single-Target or Dual-Target CAR-NK Cell Therapy for Advanced Solid Tumors

Inclusion Criteria: * Age 18-75 years. * Histologically or cytologically confirmed advanced/unresectable or metastatic solid tumor that is relapsed/refractory after standard therapy, or no standard therapy available. * Targetable antigen positivity from the protocol target menu based on: tissue biopsy and/or liquid biopsy platform (as defined in the lab manual). * Arm assignment rules : * Arm A: ≥1 antigen meets "positive" threshold * Arm B: ≥2 antigens meet "positive" threshold * ECOG performance status 0-1 (or 0-2 ). * At least one measurable lesion by RECIST 1.1. * Adequate organ function (hematologic, renal, hepatic, cardiac) within protocol-defined limits. * Willingness to undergo blood draws and required biopsies (when medically feasible). * Negative pregnancy test for participants of childbearing potential; agreement to effective contraception during and after study treatment. Exclusion Criteria: * Prior treatment with gene-modified cellular therapy (e.g., CAR-T, CAR-NK) within a defined washout period . * Active, uncontrolled infection requiring IV antibiotics; known uncontrolled HIV; active HBV/HCV with detectable viral load (per local policy). * Active CNS metastases requiring escalating steroids or urgent intervention (stable treated CNS disease may be allowed ). * Active autoimmune disease requiring systemic immunosuppression, or chronic systemic steroids above protocol threshold. * Clinically significant cardiovascular disease (e.g., recent MI, unstable arrhythmia), uncontrolled pulmonary disease, or other serious comorbidity that increases risk. * Major surgery or anticancer therapy too close to lymphodepletion (protocol-defined washout). * Pregnant or breastfeeding.