Since the COVID-19 epidemic has swept the world in 2020, international flights have been suspended or substantially reduced, which result in a continuous increase in the number of overstayed migrants. At present, international flights are resumed. In order to assist the overstaying foreign population to return to their countries as soon as possible, National Immigration Agency promotes the "Expanded Overstayers Voluntary Departure Program" from February 1 to June 30, 2023.