The picture serves as the background and is the way to write the link. For example, the logo image of the website. For example: Potato logo pictures
<a title=Tutou.com tudou.com Everyone is the director of life href=https://www.VeVb.com>Tutou.com</a>
a {display: block;width: 170px;height: 42px;text-indent: -9999px;background: url(/skin/__g/img/ui/nav/v2_v6.png) 0 0 no-repeat;}
Due to z-indent, the three words Tudou.com will not be displayed. The title attribute is the text that the mouse points to.
<a><span>link background image is not displayed completely under normal circumstances because <a>link is an inline element and is invalid for the width height attribute in the a tag css.
The improvement method is to display:block; or display:inline-block in css; and then set width and height.