The black sheep, the inferior horses that endanger the horses, the metaphor of people who endanger society or the collective.
Idiomatic Story:
Legend has it that the Yellow Emperor was going to go to Mount Guci to meet a god named Da Kui. He met a wrangler child and asked, "Do you know where Mount Gutz is going?" The shepherd boy replied: I know. The Yellow Emperor said, "Then do you know where Da Kui lives?" The child said, "I know." The Yellow Emperor felt that this child was not simple, so he asked him how to govern the world. The shepherd boy replied: Governing the world is like herding horses, as long as you go to its horse killers (get rid of the black sheep). When the Yellow Emperor heard this, he hurriedly prostrated his head in thanks, calling the shepherd boy a heavenly master.
Note: Guci Mountain, located at the junction of Xuchang Yuzhou City in central Henan Province and the three cities of Zhengzhou Xinzheng City and Xinmi City, belongs to the Yumai of Funiu Mountain.
A similar proverb: a rat, a bad pot of porridge. It is used as a metaphor for the members of an organization that are broken, affecting the entire organization.
Zhou Shan's feeling: Just like an organization now, there must be four kinds of people in it, those who are virtuous and talented, those who have no virtue and no talent, those who have no virtue and no talent. Then, the basics of the immoral and talentless are the black sheep! It must be removed, otherwise the consequences will be endless.