<div>半价促销</div>

div {
  corner-shape: round bevel bevel round;
  border-radius: 16px 48px 48px 16px / 16px 50% 50% 16px;
}

/* Ignore */
div {
  color: white;
  font: 900 32px system-ui;
  text-transform: uppercase;
  background: red;
  padding: 32px 48px;
  display: inline-flex;
  align-items: center;
  &:after {
    content: "";
    width: 16px;
    height: 16px;
    border-radius: 16px;
    margin-left: 46px;
    background: currentColor;
  }
}