A Study Comparing Ensatinib Versus Platinum-Based Chemotherapy as Adjuvant Treatment for Stage II-IIIA ALK -Positive Non-Small Cell Lung Cancer

225 mg administered once daily orally for two years.

"Pemetrexed : Participants will receive 500 mg/m\^2, day 1 , Q21D , until completion of treatment period (4 cycles), recurrence of disease, unacceptable toxicity, withdrawal of consent, or death, whichever occurs first.~Cisplatin :Participants will receive 75 mg/m\^2, day 1 , 21 days/cycle, Q21D , until completion of treatment period (4 cycles), recurrence of disease, unacceptable toxicity, withdrawal of consent, or death, whichever occurs first.~Paclitaxel: Participants will receive 175 mg/ m\^2, day 1 , 21 days/cycle, Q21D , until completion of treatment period (4 cycles), recurrence of disease, unacceptable toxicity, withdrawal of consent, or death, whichever occurs first.~carboplatin AUC= 5 mg/ mL/min, intravenously guttae, day 1 ,Q21D ，until completion of treatment period (4 cycles), recurrence of disease, unacceptable toxicity, withdrawal of consent, or death, whichever occurs first."