Imposed entry restrictions for passengers who arrive from or have been in Cabo Verde, Liberia, Montenegro. Nationals of China (People's Rep.) who are arriving from or have transited through Cape Verde, Liberia or Montenegro must have a green QR code with an 'HS' mark. The code can be obtained with a medical certificate with a negative Coronavirus (COVID-19) nucleic acid test result issued at most 3 days before departure.