“首级”是古人对头颅的别称。为什么头颅又称“首级”呢?原来,秦汉时期,军队作战有一条奖励制度,凡是斩下敌人的一个人头者,赐爵一级。古人称头为首,一首一级,久而久之,人们就把头颅叫做“首级”了。首级制度,原是为了鼓励将士奋勇杀敌,岂料士兵们为了争夺首级,经常自相残杀。据《史记》记载,项羽自刎而死,王翳取其头跑掉了,另外十余骑为争夺项羽的身子,“相杀 ”Head “ is the ancients of the alias of the skull. Why the head, also known as the ”head“? It turned out that during the Qin and Han dynasties, the army has a reward system, all those who cut the head of an enemy, thanks to the Grand Mercure level. The ancients called the head, a first-class, over time, people called the head ”“ the first level. The primary system was originally intended to encourage the soldiers to fight the enemy bravely. Unexpectedly, in order to compete for the leader, the soldiers often fratricide themselves. According to ”Historical Records“ records, Xiang Yu self-willed and died, the king run away from his head, and the other for more than a dozen ride Xiang Yu’s body, ”kill