Because the recommended image size is 570px*160px. If you want to know the size of the image you want, you can right-click the mouse and click "Properties" to view its size.
Just about the same size
If you want to have good-looking pictures, go to Baidu Signature Bar or Personalized Signature Bar. The address is as follows:
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/f? ct=&tn=&rn=&pn=&lm=&sc=&kw=%B8%F6%D0%D4%C7%A9%C3%FB&rs2=0&myselectvalue=1&word=%B8%F6%D0%D4%C7%A9%C3% FB&tb=on