SOURCE

<div class="box1">
      <img class="img1" src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fwww.08lr.cn%2Fuploads%2Fallimg%2F170513%2F1-1F513164126.jpg&refer=http%3A%2F%2Fwww.08lr.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1614342078&t=573647a01fca7ff9b16298550fa909ce" />
</div>
<div class="box2">
      <img class="img2" src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fwww.08lr.cn%2Fuploads%2Fallimg%2F170513%2F1-1F513164126.jpg&refer=http%3A%2F%2Fwww.08lr.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1614342078&t=573647a01fca7ff9b16298550fa909ce" />
</div>

.box1{
    position: relative;
    z-index: 0;
}

.img1{
    position: absolute;
    z-index: 999999;
    width:200px;
    border: 1px solid #0000ff;
}

.box2{
    position: relative;
    z-index: 1;
    margin-left: 100px;
}

.img2{
    position: absolute;
    z-index: -1;
    width:200px;
    border: 1px solid #ff0000;
}