JSFiddle - React, Tailwind, and code Playground

HTML

<div id="first">
我是第一個DIV
</div>
<div id="hoverme">
<div id="second" class="hidden">
我是第二個DIV,你想開美甲店嗎?
</div>
</div>

CSS

#first {
    width: 100px;
    height: 100px;
    background-color: #00ff33;
}

#second {
    width: 100px;
    height: 100px;
    background-color: #00ff33;
    visibility: hidden;
}
#hoverme {
    width: 100px;
    height: 100px;    
}
#hoverme:hover #second {
   background-color: #ff9355;
   visibility: visible;
}