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During the Tang Dynasty, Emperor Taizong once returned from court in a fit of rage, vowing to execute Wei Zheng, whom he dismissively referred to as a mere 'country bumpkin'. Empress Changsun inquired about the reason for his fury.
Taizong explained that Wei Zheng had publicly insulted him during the imperial assembly.
The Empress then wisely responded, 'I have heard that when the sovereign is enlightened, the ministers are honest and straightforward. Now, Wei Zheng is indeed straightforward, which reflects Your Majesty's own enlightenment. How could I not offer my congratulations?'
Upon hearing her words, Emperor Taizong's anger subsided and turned into joy.

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Open the tool →主明臣直 (zhǔ míng chén zhí) is a Chinese idiom (chengyu) meaning “When the leader is enlightened and virtuous”.
主明臣直 is pronounced zhǔ míng chén zhí in Mandarin Chinese.
Literally, 主明臣直 means “Ruler enlightened, subordinate upright”. It is used to mean “When the leader is enlightened and virtuous”.
主明臣直 comes from a classical Chinese story dating back to ancient China. The full story is on this page.
主:君主。君主圣明,臣下也就正直