Senses
江山易改，本性难移/ 江山易改，本性難移 you can't change who you are
(idiom) it is easier to change mountains and rivers than to alter one's character; used to emphasize that a person's nature is deeply rooted and difficult to change
江山易改，本性难移/ 江山易改，本性難移 a leopard cannot change its spots
rivers and mountains are easy to change, but a person's nature is hard to alter; it is difficult to change one's fundamental character