QR codes – bar codes that can be read by mobile phones – have been used in China during the pandemic.
Click here for original story, Covid-19: China pushes for QR code based global travel system
Source: BBC
QR codes – bar codes that can be read by mobile phones – have been used in China during the pandemic.
Click here for original story, Covid-19: China pushes for QR code based global travel system
Source: BBC