<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title></title>
  </head>
  <body>
    <form action="#" method="get">
    <!--
          时间：2021-03-28
          描述：
        <input type="email" name="formmail" required/><br />
      <input type="url" name="user_url" required/><br />-->
      <input type="text" name="postal code"  pattern="[1-9]{6}(?|d)" required/> 
      <input type="submit" value="submit"/>
    </form>
  </body>
</html>