Old diseases are hard to cure
It is a Chinese idiom. The Pinyin is Ji ù B ì NGN á NY ī, which means that it is difficult to correct the past mistakes. From Handan, Sanhua.
The origin of Idioms
The third part of Ming Dynasty's Wu Mingshi's "Sanhua Handan" is: "you can't find an escape plan when you are a prisoner holding an official. You can't turn back quickly until you regret coming late, and you don't tie up your heart and mind. It's not that your nature can't be changed and your old illness can't be cured."
Idiom usage
Used as an object or attribute
Old diseases are hard to cure
so that there is no end [ of our toils - mí suǒ dǐ zhǐ
dissipated young sets who take a fancy to lewdness - yóu fēng xì dié
Entering a room and going up to a higher level - rù shì shēng táng
a pleasant night cow coupled with a fine landscape - liáng xiāo měi jǐng