Chapter 169: Smart but Weak (Please Subscribe, Add to Favorites, Request Monthly Tickets)

Having passed through the turnstile, He Ao glanced at the card in his hand.

The card bore the likeness of a gaunt middle-aged man, resembling Joey by about fifty to sixty percent, complete with some dried, uncleaned bloodstains.

It was Joey's father's work card.

The principle behind these factory-customized work cards to open doors is that every card's internal chip has a code corresponding to the worker's ID number.

When the card is first made, a specialized authorization machine authorizes it, and only those with authorized cards can swipe through the access control turnstiles; this authorization has a maximum validity of one month.

And the turnstile itself is both an authorization and a verification machine.

Whenever the authorization expires, the turnstile reads the card's code and uploads the data to the cloud database to compare with the information of workers in the database.