江ㄐㄧㄤjiāng山ㄕㄢshān易ㄧˋyì改ㄍㄞˇgǎi，本ㄅㄣˇběn性ㄒㄧㄥˋxìng難ㄋㄢˊnán移ㄧˊyí

  1. 山河的面貌隨年月而有變化，而人的稟賦性格卻根深蒂固。比喻人的本性極難改變。也作「江山好改·秉性難移」、「江山易改，稟性難移」、「山河易改，本性難移」 。

客天變一時，人變一世
英it is easier to change mountains and rivers than to alter one's character (idiom)​, you can't change who you are, Can the leopard change his spots?