article_snippet.sent: was a hoax - particularly as Gao had been unable to speak for five days.
article_snippet.sent: The story has gone viral in China and has been reported on all the main news websites.
article_snippet.sent: The People's Daily reported that the local Public Security Bureau has started an investigation into the incident.
highlights_snippet.sent: He has not spoken since the prank which went wrong five days ago .
  
highlights_snippet.sent: Doctors can't explain sudden voice loss and think it may be psychological .