SOURCE

<div id="phone">
 <div id="note">
   <div id="text">
  <p>生日提醒</p>
   </div>  
  <div id="names">
     <div><p>张三</p></div>
     <div><p>张三</p></div>
     <div><p>张三</p></div>
     <div><p>张三</p></div>
     <div><p>张三</p></div>
     <div><p>张三</p></div>
     </div>  
  </div>

#phone{
  border:2px solid red;
  width:375px;
  height:667px;
}
#names{
  display: flex;
  justify-content: space-around;
  font-size:10px;
}
#text{
  margin-left:15px;
  margin-right:15px;
  border-bottom-width:0 0 2px 0;
  border-bottom-style:solid;
  border-bottom-color:grey;
  height:30px;
  font-size:20px;
}