To remain incorruptible and uphold integrity, refusing to be sullied by illicit gains or bribes; to maintain one's purity of conduct, especially in official roles.
那位老先生担任财务主管多年，始终清廉自守，真正做到了脂膏莫润，赢得大家的敬佩。
The old gentleman, serving as finance director for many years, always maintained his integrity and truly lived up to the spirit of 'zhi gao mo run,' earning everyone's admiration.
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