积重难返 (jī zhòng nán fǎn) | Meaning: ingrained habits are hard to overcome (idiom); bad old practices die hard | Chinese Idiom with Pinyin & Origin

deep-rooted (problem etc)根深蒂固gēn shēn dì gù

difficult · challenging · straitened circumstances · difficult situation困难kùn nan

a wrong repeated becomes right (idiom); a lie or an error passed on for a long time may be taken for the truth积非成是jī fēi chéng shì

old habits are hard to change (idiom)积习难改jī xí nán gǎi

ingrained habits are hard to overcome (idiom); bad old practices die hard