Chinese characters. 

 - Beijing :  Foreign Languages Press,  1989. 
 - 22 p. ; 
<br/><br/><label>ISBN: </label>7119011014 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Written communication.
<br/><br/><label>Dewey Class. No.: </label>302.2244  / Ch