RecruitingPhase 1Drug trialA Study to Evaluate the Safety, Pharmacokinetics and Efficacy of TJ101 in Patients With Advanced/Metastatic Solid TumorsThe goal of this clinical trial is to evaluate whether TJ101, an investigational antibody-drug conjugate (ADC), can safely and effectively treat patients with advanced solid tumors. The main objectives of this study are : * To Determine the maximum tolerated dose (MTD) and recommended dose for expansion (RDE) of TJ101 * to show preliminary antitumor activity in patients with advanced solid tumors Participants will: * Receive intravenous (IV) infusions of TJ101 at escalating dose levels (during dose escalation) or at the selected expansion dose. * Undergo regular tumor imaging to assess response. * Provide blood samples for pharmacokinetics (PK) and biomarker analysis. * Be monitored for side effects and overall tolerability. This study is being conducted in adult patients with advanced or metastatic solid tumors who have exhausted standard treatment options