A single-Arm, open-label, multi-center, phase I/II study in which the pharmacokinetics, safety, tolerability and efficacy of LDK378 will be assessed in adult Chinese patients with locally advanced or metastatic NSCLC harboring a confirmed ALK rearrangement. Patients must have demonstrated progression during or after crizotinib treatment whether or not previously treated with cytotoxic chemotherapy. Approximately 100 patients will be enrolled. For the first 15 patients enrolled in this study, patients will have an additional 5-day PK run-in period before treatment period. The pharmacokinetics profile of LDK378 in Chinese adult patients with ALK-rearranged NSCLC will be evaluated.