Tā chǔlǐ wèntí gōngzhèng wú sī, shēn dé dàjiā xìnrèn.
He handles matters fairly and selflessly, earning everyone's trust.
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Attested in 《荀子·赋》 and 《淮南子·修务训》: the latter praises the sage-king Yao for being 公正无私, 一言而万民齐 — 'impartial and selfless; one word and the people were ordered.' A classical ideal for rulers and judges.