How to check the serial number of the cover of a red envelope: first click on the red envelope, and then click on the cover of the red envelope to see the serial number.

How to get the serial number of the red envelope cover: first enter a dialog box, then click the+sign, then select the red envelope, then click the red envelope cover, then the user enters the interface of setting the red envelope cover, then enter the serial number on the red envelope cover and click OK.