1. Open WeChat and click the "I" option in the lower right corner.
2. In the new interface that pops up, click the arrow on the right side of the avatar to enter the personal information page. In the new interface that pops up, find more options and click Enter.
3. In the new interface that pops up, find the option of personalized signature, and click Enter Edit.
4. You can enter the personalized signature you want to set here, and then click Save in the upper right corner.