CodePen Embed - HTML là gì? Ví dụ 8: Liên kết đến SĐT hoặc Email

<h1>Liên kết đến SĐT hoặc Email</h1>
  <span>Gọi ngay: </span><a href="tel:02435574074">02435574074</a>
  <br/>
  <span>Gửi Email: </span><a href="mailto:hello@niithanoi.edu.vn">hello@niithanoi.edu.vn</a>

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