RecruitingDrug trialFirst-in-Human Investigation of JMT108 Injection in Participants With Advanced Malignant TumorsThis study is designed as an open-label, multi-center Phase 1 clinical study in participants with advanced malignant tumors to evaluate the safety, tolerability, PK characteristics, and preliminary anti-tumor activity of JMT108 injection, and to determine the RP2D/schedule for subsequent studies.