BANGKOK -- Many shoppers ventured out to the Central World when the capital's shopping mall opened for the first time in two months on Sunday. But they had to first "check in" at the door by using their smartphone to scan QR codes displayed by attendants.
QR code scanning is part of the government's contact tracing platform dubbed Thai Chana, or "Thais Win." Upon scanning the code, customers enter their phone number. When leaving the mall, they scan the code again and enter the time spent on the premises.
