On February 18, 2020, the Central Epidemic Command Center (CECC) indicated that the number of confirmed cases of coronavirus disease 2019 (COVID-19) on the cruise liner Diamond Princess, which docked in Yokohama, is growing and four Taiwanese passengers on board the cruise ship have been diagnosed with COVID-19. In order to ensure the safety and right of return of the Taiwanese passengers, the CECC announced that the cruise ship has been regarded as a location with COVID-19 cases since February 18. If the Taiwanese passengers on board the cruise ship (including passengers and crew members) wish to return to Taiwan, such passengers are required to return on a charter flight arranged by the CECC and abide by relevant quarantine measures.