QLC1101 is a selective reversible inhibitor of KRAS G12D, with the dosage form of capsules and administration route of oral administration. In the first-in-humans (FIH) study, the sponsor will explore the safety, tolerability, pharmacokinetics (PK), and preliminary efficacy of QLC1101 in subjects with advanced solid tumors harboring a KRAS G12D mutation. The FIH study includes dose escalation, PK expansion, and efficacy expansion.

Inclusion Criteria:

1. Patients with histologically confirmed advanced (metastatic or unresectable) solid tumors harboring a KRAS G12D mutation. Sign the ICF.
2. Those who fail or are unable to tolerate standard treatment, lack standard treatment, or refuse to receive standard treatment;
3. Those who are able to swallow and retain oral medication and must not have any clinically significant gastrointestinal abnormality that may alter absorption;
4. Subjects who have at least one measurable lesion documented by computed tomography (CT) and/or magnetic resonance imaging (MRI) as confirmed by the investigator per the RECIST v1.1 criteria.
5. ECOG PS score: 0 or 1;
6. Expected survival time ≥ 3 months;
7. Adequate organ function at screening:

Exclusion Criteria:

1. Previously treated with inhibitors against KRAS G12D mutation;
2. The period of time prior to the first dose of investigational product should be at least 28 days from previous treatment or at least 5 half-lives
3. Known immediate or delayed hypersensitivity or idiosyncratic reaction to the ingredients of the preparation used in the trial;
4. Presence of other active malignant tumors in addition to primary tumors;
5. Presence of serious lung diseases at screening;
6. Clinically significant gastrointestinal disorders or other conditions that seriously interfere with drug absorption;
7. Severe hereditary or acquired hemorrhagic diathesis or coagulation disorders;
8. Complicated with clinically significant cardiovascular and cerebrovascular disorders;
9. History of allogeneic hematopoietic stem cell transplantation or organ transplantation (except corneal transplantation);
10. Presence of known mental disorders, epilepsy, dementia, or alcohol and drug abuse that may affect the compliance with study requirements;
11. the investigator determines that participation in the study is not in the best interest of the subject.