Zi Collection, Middle Volume, Page 12, Entry 12 Pronounced yi (falling tone) The area below the cheek is called "gai". Sometimes also written as "hai". Wu Yin Ji Yun (Wuyin Jiyun) Pronounced hu (falling tone) lai (rising tone) This is a common variant of the character "hai". The area below the cheek is called "gu". Sometimes it is the character "hai". Also, the area below the chin.