2. After opening WeChat, click on our address book at the bottom, and our friends will appear.

3. Find the WeChat friend we need to comment on, and click on this friend.

4. After clicking, the personal information of this friend will appear. Let's click "…" in the upper right corner.

5. After clicking, this page will appear, and then we will click the first item "Set comments and labels".

6. After clicking, a page will appear. At the top, you need to fill in the name of this friend to mark it. When you are finished, click "Done" in the green font in the upper right corner.

7. When we return to the address book, we will see that the friends' names we wrote down are successful.