Inclusion Criteria:

• 1. Signed the informed consent form prior to performing the specified procedures required by the study.
• 2. Aged ≥18 years.
• 3. Eastern Cooperative Oncology Group (ECOG) performance status score of 0 or 1.
• 4. Expected survival ≥12 weeks.
• 5. Laboratory test results indicating sufficient organ function.
• 6. At least one measurable lesion per RECIST v1.1;

Exclusion Criteria:

• 1. A history of other malignant tumors within 2 years.
• 2. With symptomatic central nervous system (CNS) metastases.
• 3. Gastrointestinal diseases that affect drug administration/absorption.
• 4. Known psychiatric disorders or substance abuse that may interfere with the conduct of the study.
• 5. Uncontrolled pleural effusion, pericardial effusion or ascites requiring drainage or medical intervention within 4 weeks.
• 6. Any active infection requiring systemic treatment within 2 weeks.
• 7. A history of non-infectious pneumonia requiring oral or intravenous steroid therapy for recovery, or interstitial lung disease (ILD) or severe obstructive pulmonary disease.
• 8. Previous treatment with RAS-targeting therapies other than RAS (OFF) inhibitors.
• 9. Failure to recover from adverse events (AEs) caused by previous antineoplastic therapy.
• 10. Currently participating in or having participated in a study of other investigational drugs or devices within 4 weeks.
• 11. Major surgery within 4 weeks.
• 12. Previous antineoplastic therapy before the first dose of study treatment should have a certain wash-out period
• 13. Vaccination with any live vaccine within 4 weeks.
• 14. Known human immunodeficiency virus (HIV) infection or acquired immunodeficiency syndrome (AIDS).
• 15. Active hepatitis B virus (HBV) or hepatitis C virus (HCV) infection;
• 16. A history of clinically significant cardiovascular disease.
• 17. A history of allogeneic organ transplantation or graft-versus-host disease (GVHD).
• 18. Known hypersensitivity to the study drug or any of its excipients.
• 19. Participants who are pregnant or breastfeeding.