Study of BEBT-109 in Subjects With Non-Small Cell Lung Cancer Carrying EGFR Exon 20 Insertion Mutations

BEBT-109 Capsules: Administration and Dosage: Oral administration, 120mg or 180mg; Frequency and Duration of Administration: Once a day or twice a day,and 21 days as a treatment cycle.

Pemetrexed Disodium for Injection: Administration and Dosage: Intravenous infusion, 500mg/m\^2; Frequency and Duration of Administration: On the first day of each cycle,and 21 days as a treatment cycle.

Carboplatin Injection: Administration and Dosage: Intravenous infusion, AUC=5 mg/ml.min, with a single dose not exceeding 800 mg; Frequency and Duration of Administration: On the first day of each cycle for the first four cycles, and 21 days as a treatment cycle, totaling four cycles.

Cisplatin Injection: Administration and Dosage: Intravenous infusion, 75 mg/m\^2; Frequency and Duration of Administration: On the first day of each cycle for the first four cycles, and 21 days as a treatment cycle, totaling four cycles.