A Study to Evaluate the Safety, Tolerability, Pharmacokinetics (PK), and Antitumor Activity of ALK202 in 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.