唇竭齿寒

Explanation: See "interdependent." 　　Source: "Zhuangzi flank of animal trunk" Hence it is, exhaust teeth lips cold, thin wine, Handan Lu Wai, born thief from St. " 　　Examples: Valley River dried up and empty, Qiu Yi and Yuan plug, exhaust and teeth lips and cold. ★ "said Huai Lin training"