Hello! The replacement method is as follows: 1. Open your enterprise WeChat, and click "Location indicated by red mark" in the main interface to open it. 2. In the newly opened interface, click on your "avatar". 3. In the opened new interface, continue to click "My avatar" to open a new interface. 4. After opening "Personal Information", slide down the screen, find "Work Signature" and click. 5. After opening the work signature setting interface, you can fill in "personalized signature" in the box indicated by the red mark, and then click "√" in the upper right corner of the screen to save. I hope I can help you!