During the reign of Emperor Wenzong of the Tang Dynasty, Wei Mo served as a Reminder of the Right. The emperor held him in high regard because he was the fifth-generation descendant of the renowned early-Tang chancellor Wei Zheng. True to his ancestor's legacy, Wei Mo often offered direct and candid remonstrations to the throne.
During the Tang Dynasty, Imperial Censor Li Xiaoben, a member of the imperial Li clan, was executed for being implicated in another's crime, and his daughter was taken into the palace. Advisor Wei Mo found this morally unacceptable and immediately submitted a memorial urging the emperor to release her. The emperor agreed, freed the girl, and promoted Wei Mo to the post of Right Rectifier of Omissions. In his imperial decree, the emperor explained, 'Taking Li's daughter into the palace was meant to have her clean the princes' quarters, not to increase the number of entertainers; it was to care for a young imperial relative, not to conscript a palace maid. Even so, since outsiders could not easily distinguish between these intentions, and the matter could not be announced to every household, it was mistakenly seen as a violation of human decency. You dared to remonstrate as directly as your ancestor did; how could I not humbly accept loyal counsel? Your official tenure is still short and does not warrant promotion, but I cannot treat a loyal minister by standard regulations, so I have elevated you to Right Rectifier of Omissions.'
Later, the idiom "from house to house" came to describe spreading news to every household, making sure everyone knows.
Source: *Old Book of Tang*, Biography of Wei Mo
Meaning of the Idiom: Later, the Chinese idiom "家至户晓" came to describe spreading news to every household, making sure everyone knows.