How to match chinese sentence with java(regex)?

Is there any method to match a chiness sentence?
There is a text file which mixed chinese and english, and I want to extract all chinese but leave English out,how can I do this?

Theoratically this should work.   Use Internationalization with native2ascii.exe to convert your text file to Unicode (if it's not in
   Unicode already)
   Use Chinese Unicode range to filter out character by characterLet us know if it's any help to you!

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