A First-in-Human, Open-Label, Multi-Center Phase I Clinical Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Antitumor Activity of ALK202 for Injection in Adult Participants with Advanced Solid Tumors

Inclusion Criteria: * Men and women ≥18 and ≤75 years old on the day of signing the ICF * At least 1 measurable lesion per RECIST v1.1 * Expected survival ≥3 months * ECOG PS score of 0 or 1 * Adequate organ function * Female participants of childbearing potential or male participants whose partner is a female of childbearing potential agree to use medically effective contraceptive methods (abstinence, birth control pills, barrier contraception, intra-uterine contraceptive device, etc.) from the date of signing the ICF until at least 6 months after the last dose of ALK202, and during this period, male participants are not allowed to donate sperms. Exclusion Criteria: * Received organ transplant or hematopoietic stem cell transplant previously * Vaccinated with live vaccines within 4 weeks prior to the first dose * Primary central nervous system malignancies, or active metastases to central nervous system and/or metastases to meninges * Pregnant or lactating women * Pleural effusion, pericardial effusion, or intraperitoneal effusion accompanied with clinical symptoms, clinically poorly controlled, or requiring repeated drainage. * Evidence of other severe or uncontrolled systemic diseases (e.g., decompensated respiratory disorder, hepatic disease, or renal disease). Note: Other protocol defined Inclusion/Exclusion criteria may apply.