Each badge has a corresponding task rule. You can get the badge after completing the task.
Why can't I get some badges?
Each badge can only be claimed once by a user, and cannot be claimed multiple times. You need to confirm that you have met the conditions for claiming the badge.
System announcement
Welcome to the Badge System! You can display up to 3 badges on your profile by going to the "My badge" tab, hovering over the desired badge, and clicking "Wear the badge".