汗马之劳

Explanation: ① refers to the fatigue of battle. Also refers to the exploits. ② fatigue refers to horse transport. 　　Source: "Han Feizi," a private matter and must be abandoned horse sweat labor, family hardships, of the Front, the poor and carry on. " 　　Examples: Death ship Fang, Yi-fang contains fifty people, and the March of food, water and floating, a day in the line of San Baiyu; miles, though many, does not cost ~. ★ "Warring States Chu policy a"