CodePen Embed - pYeVrG

<div class="w1">你好 Hello World</div>
<div class="w2">你好 Hello World</div>
<div class="w3">你好 Hello World</div>
<div class="w4">你好 Hello World</div>
<div class="w5">你好 Hello World</div>

.w1{
  font-weight: normal;
}
.w2{
  font-weight: bold;
}
.w3{
  font-weight: bolder;
}
.w4{
  font-weight: lighter;
}
.w5{
  font-weight: 200;
}

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