<div class="box">
  <div>
    I'm fatfish, 6 years of programming experience, like front-end, writing
    and making friends, looking forward to becoming good friends with you.
  </div>
</div>
<div class="box box-hide-scrollbar">
  <div>
    I'm fatfish, 6 years of programming experience, like front-end, writing
    and making friends, looking forward to becoming good friends with you.
  </div>
</div>

* {
  margin: 0;
  padding: 0; 
}

body {
  padding: 15px;
  color: #324b64;
}

.box {
  width: 375px;
  overflow: scroll;
}
/* Key Style */
.box-hide-scrollbar::-webkit-scrollbar {
  display: none; /* Chrome Safari */
}

.box > div {
  margin-bottom: 15px;
  padding: 10px;
  background-color: #f5f6f9;
  border-radius: 6px;
  font-size: 12px;
  width: 750px;
}