You Collection, Upper Volume Radical: Speech (yán) 26 strokes Page 1188, Entry 05 Comprehensive Collection of Characters (Zihui): Pronounced yi (falling tone). Talking in one's sleep. Supplement to the Comprehensive Collection of Characters (Zihui bu): Also refers to speaking in a hidden place. Also used as a personal name. Yi bi yi, found in History of Song (Songshi), Table of the Imperial Clan. Correction of Characters (Zhengzitong): Same as the character for talking in one's sleep (yi). It should be written as this character.