Passengers are seen at the Toronto Pearson International Airport on September 9, 2020. Starting from Wednesday, passengers who are to take a direct flight from Canada to China should take COVID-19 nucleic acid tests and provide a certificate of negative test result issued within three days before boarding. (Photo: China News Service/Yu Ruidong)
A ground crew member shows passengers' nucleic acid test certificates at the Toronto Pearson International Airport on September 9, 2020. (Photo: China News Service/Yu Ruidong)
A ground crew member checks passenger's nucleic acid test certificate at the Toronto Pearson International Airport on September 9, 2020. (Photo: China News Service/Yu Ruidong)
A ground crew member checks passenger's nucleic acid test certificate at the Toronto Pearson International Airport on September 9, 2020. (Photo: China News Service/Yu Ruidong)
A passenger has his temperature checked at the Toronto Pearson International Airport on September 9, 2020.(Photo: China News Service/Yu Ruidong)
