A Study to Evaluate Safety and Efficacy of WSD0922-FU Combo With Osimertinib for NSCLC

Inclusion Criteria: * ≥Age 18, gender is not limited; * Locally advanced or metastatic NSCLC confirmed by pathology; * Patients who have been genetically tested to carry EGFR sensitive mutations; * Blood/Tissue samples must be provided for testing; * Must have a minimum life expectancy of \>= 3 months; * At least one measurable tumor lesion according to RECIST version 1.1; ● Previous radiotherapy-treated lesions cannot be used as target lesions unless imaging studies show clear progression of the lesions. * Physical Status (ECOG PS) score was 0-1; * Have full organ function; * Eligible patients (male and female) who are fertile must agree to use a reliable contraceptive method ; * Subjects are required to give informed consent to this study before the experiment and sign a written informed consent voluntarily. Exclusion Criteria: * Received chemotherapy, radiotherapy, biological therapy, targeted therapy, endocrine therapy, immunotherapy, or other anti-tumor drug treatments within 4 weeks before the first administration of the study drug. * Have previously received more than two EGFR-TKI inhibitors for part A; * Received major organ surgery (excluding puncture biopsy) or significant trauma within 4 weeks before the first administration, or require elective surgery during the trial period. * Used strong CYP3A4 inhibitors or strong CYP3A4 inducers within 7 days before the first use of the study drugs. * Adverse reactions from previous anti-tumor treatments have not recovered to NCI-CTCAE v5.0 grade ≤1 (except for toxicities judged by the researcher to have no safety risks, such as hair loss, grade 2 peripheral neurotoxicity, and stable thyroid function after hormone replacement therapy). * Skin/pressure ulcers, chronic leg ulcers, known active gastric ulcers, or non-healing wounds. * History of severe allergies, or allergies to any active or inactive ingredients of the study drug; * Severe infections requiring intravenous antibiotic infusion or hospitalization at the time of screening; or uncontrollable active infections within 4 weeks before administration; * Known active or suspected autoimmune diseases; or known active ocular diseases (such as active wet age-related macular degeneration, diabetic retinopathy with macular edema); * Human immunodeficiency virus (HIV) (HIV1/2 antibody) positive, syphilis spirochete antibody positive . * Patients with interstitial lung disease. * History of severe cardiovascular diseases. * Unable to orally swallow medication, or there is a condition that significantly affects gastrointestinal absorption as judged by the researcher; Clinical intervention is required for pleural effusion, ascites (excluding subjects who do not need drainage and have been stable for more than 2 weeks after drainage). * Known alcohol or drug dependence. * Mental disorders or poor compliance; * Pregnant or lactating women; * The investigator believes that the subject has other reasons that make them unsuitable for participating in this clinical study.