蜻蜓撼石柱 [ㄑㄧㄥ ㄊㄧㄥˊ ㄏㄢˋ ㄕˊ ㄓㄨˋ; qing1 ting2 han4 shi2 zhu4] lit. the dragon-fly shakes the stone tower (idiom); fig. to overestimate one's capabilities ◄ ►