Study to Evaluate D-1553 in Combination With IN10018 in Subjects With Solid Tumors

Inclusion Criteria: * Subject with histologically proven, locally advanced, unresectable and/or metastatic solid tumor, for which no standard treatment is available or the subject is refractory to or intolerant of existing standard treatment. * Subject has KRasG12C mutation in tumor tissue or other biospecimens (only for phase1b) containing cancer cells or DNA. Historical, local laboratory result (up to 5 years prior to this study) can be used. * Subject has tumor type requirement as follows: advanced or metastatic solid tumors including NSCLC and CRC. * Subject has measurable disease according to RECIST, v1.1 Exclusion Criteria: Subject with unstable or progressive central nervous system (CNS) metastases. * Subject with acute myocardial infarction, severe/unstable angina; or with cardiac insufficiency of New York Heart Association Functional Classification Grade 2 or above. * Subject has corrected QT interval using Fridericia's formula (QTcF) prolongation at rest, where the mean QTc interval is \> 480 msec based on triplicate measurements of electrocardiogram (ECG). * Subject with stroke or other severe cerebrovascular diseases within 12 months before enrollment; * Subject with interstitial lung disease or acute lung infection not yet recovered including but not limited to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection; * Subject is pregnant or lactating.