點鐵成金 [ㄉㄧㄢˇ ㄊㄧㄝˇ ㄔㄥˊ ㄐㄧㄣ; dian3 tie3 cheng2 jin1] to touch base matter and turn it to gold (idiom); fig. to turn crude writing into a literary gem ◄ ►