During this period, people are advised not to go out except for buying essential items. Thus, the payment counter are the most crowded and risky place one can be. There might be cases there where we are not aware of.
By building a system to record all payment transaction, we are able to determine who are the person in line, in front or behind that may be a carrier or victim. This system identify them, if they paid with e-wallet or card and able to track all their past locations they been to including payment for ticketing/public transport accurate to 1 meter(shop location) in real time.
We can also track the total number of people in a certain location and time as well as their travel history based on their purchase information. The system only able to look up an individual location if they connect and link their payment information - if that person is a confirm case then will open up their card/e-wallet no.