keyword: Fugitive disguise betel nut, small mouth caught cherry oral mucosa shots drowning alkaloids Abstract: in 2002, Shunde man Xie killing fled after the, escape, fearful he day by eating betel nut drowning, soon unexpectedly accident found his mouth is getting smaller, hence by the escaped the police investigation. It is reported that the oral mucosa and the content of the alkaloids contained in the nut to change the hard, eat more mouth degrees will be smaller.