Girl , 16 , is beaten and covered in toothpaste in school dormitory . Pictures then uploaded to China 's second biggest social networking site . Police name ringleader as Lu Tung say she is now on the run .
Girl , 16 , is beaten and covered in toothpaste in school dormitory . Pictures then uploaded to China 's second biggest social networking site . Police name ringleader as Lu Tung - and say she is now on the run .