...Subjects with locally advanced unresectable or metastatic malignant solid tumors confirmed by histology and/or cytology and CLDN 18.2 positive expression in the tumor tissue confirmed by the central laboratory: dose-escalation phase defined as IHC ≥ 1+ by central laboratory IHC assay; dose-expansion phase and extension cohort studies defined as CLDN18.2 expression in ≥ 40% of tumor cells, the IHC ≥ 2+); 4....