title: How to use regular expression to validate Chinese input?
body: <p>The thing is I need to treat this kind of Chinese input as invalid in client side validation: </p>
  
  <p>Input is invalid when any English character mixed with any Chinese character and spaces has a total length >=10.</p>
  
  <p>Let's say : "你的a你的a你的a你" or "你的 你的 你的 你" (length is 10) is invalid. But "你的a你的a你的a" (length is 9) is OK.</p>
  
  <p>I am using both Javascript to do client side validation and Java to do the server side. So I suppose applying the regular expression on both should be perfect. </p>
  
  <p>Can anyone give some hints how to write the rules in regular expression? </p>