codereview - gerrit synchronizes code to gitlab

Question

I deployed docker and gerrit on gitlab. Now both systems can operate normally, but gerrit's repo is independent from gitlab's

Now I want to do the following process, gitlab-repo refers to the code base on gitlab, gerrit-repo refers to the code base gerrit on

1. Get code from gitlab-repo

2. Local modification, submit

3. push to gerrit-repo on

4. Others codereview

5. After the review is completed, gerrit automatically merge to gitlab-repo on

6. Other people get the code from gitlab-repo to continue development

Everything else is fine now, except for Step 5 I don’t know how to implement it. I looked through the official documents and couldn’t find it...