*{
    margin: 0;
    padding: 0
}
.div{
    width: 100%;
    height:300px;
    background-size: 100%;
    background-repeat: no-repeat;

    animation:frams 10s ;
    background-image: url("/img/beijing.jpg");
}


.div1{
    width: 100%;
    height:600px;
    background-size: 100%;
    background-repeat: no-repeat;
    animation:frams 10s ;
    background-image: url("/img/beijing.jpg");
}