Get the string form of the html element

html:

            <ul id="box">
                <li><img src="image/i1.png" alt=""></li>
                <li><img src="image/i2.png" alt=""></li>
                <li><img src="image/i3.png" alt=""></li>
            </ul>

script:

    var mybox = document.getElementsByTagName("li");
    document.write(mybox[1].innerHTML);
    
    

output result:
image/i2.png this picture will be displayed on the web page, can I get this string?

<li><img src="image/i2.png" alt=""></li>
Mar.14,2021

javascript:

  

var mybox = document.getElementsByTagName ("li");
alert (mybox [1] .innerHTML);

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