Hi @Lykemtheng He -- Welcome to the Atlassian Community!
Issues with epics are already linked to them, either by "Epic Link" for company-managed projects or "parent" for team-managed projects.
What problem are you solving by adding another link from the child to the epic? Thanks!
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events