一举两得
管庄子和他的邻居上山砍柴，看见两只老虎在抢着吃一只羊。管庄子举起柴刀，就要上去砍老虎。邻居说：“等一等！” 他们躲在大树后面，看着两只老虎打架。大老虎咬住小老虎的头颈，小老虎咬住了大老虎的前腿。
过了一会，大老虎咬死了小老虎，可是小老虎也咬伤了大老虎的前腿。这时候，管庄子和他的邻居举起柴刀，把大老虎砍死了。
他们背着两只老虎回家去。邻居高兴地对管庄子说：“这叫做 ‘一举两得’啊！“
成语 Chéngyǔ，similar to English idiom, is a word group or a phrase which is established through usage and practice. Unlike English idiom, a Chéngyǔ is often made of a fixed number of Chinese characters, and most Chéngyǔ (98%) have four characters. Chéngyǔ often contain literary allusions which were derived from analogy or historical stories. The meaning of a Chéngyǔ is often much more difficult to derive from its constituents than an average English idiom. While some modern Chéngyǔ have a direct literal translation in other languages, many Chéngyǔ do not have a foreign language equivalent due to their strong historical background. One, who is able to master the use of Chéngyǔ, is considered as well-educated and receives respect.