Would know. It's not a health code that's been scanned, but it can be found out.

The trip code is the communication big data trip card, equivalent to the health code, is by the China Academy of Information and Communication Technology jointly with China Telecom, China Mobile, China Unicom three basic telecommunications enterprises to use the data received by the cell phone, through the user's cell phone is located in the location of the base station to obtain, for the country's 1.6 billion cell phone users free of charge to provide the query service, the cell phone users can be used through the service, to query the person's previous

"Journey Card" can be used by everyone:

As long as you have a cell phone and are a user of any of the three carriers, Telecom, Unicom and Mobile, you can use the service. However, new account holders can only use the service after 14 days.