1. Click Write to me to jump to this interface:

2. Click the "Email me" button in the lower right corner.

3. Click "I want to experience"

4. Click "Get Code" and paste it into "Edit Custom Bar"

Note: The picture connection at the red line needs to be a picture in CSDN space. In other words, you need to replace the "picture connection" in the code obtained at "Get Code".

My approach is: first put the screenshot of "write to me" in the photo album of CSDN blog, get its connection, and then replace the connection at the red line.