Hope City wanted their child checkin labels to generate a zpl code that contains a link to that person's profile page.
I created a Label Merge field that contains just the URL, plus the zpl code switch 'QA,' at the beginning of the URL:

Then I added the merge field to the label with an identifier of QR:

Finally I added this line of code to the label:

Here is the result as seen from a mobile phone:

