"All people close to Zhu Zhechi are black" is just an extreme statement. Although there are such examples, not all of them are like this. Whether it is "black near ink, black near ink" depends on people's own ability. If you are "close" to Zhu and don't study, you are not "red"; If he "approaches" Mo instead of getting rid of his bad habits, then both of them will become "red".
In fact, reading too much "near Zhu Zhechi, near Mexico, black" will make you feel unreasonable. A bad guy and a good guy are together, so will both of them become good guys or bad guys? If it is the former, wouldn't the whole world become a good person? If it is the latter, wouldn't it be that the whole world has become a bad person?
For example, if the police deal with thieves every day, will every policeman become a thief? Except for petty theft, I deal with the police every day. Can every thief be a good man like a policeman?
"Those who are near Zhu Zhechi and those who are near Mexico are black" is a contradiction. Nothing is absolute, and the confirmed facts may be distorted. Let's say "near Zhu Zhechi, near Mexico is black".