"The academic circles have launched an academic debate on Confucian ethics around the issue of' father and son keeping secrets'. One side thinks that it is natural for father and son to hide from each other; On the other hand, it is illegal and immoral for father and son to hide from each other. The two sides have different views on father-son seclusion, but their understanding of father-son seclusion is the same, that is, they all think that father-son seclusion is mutual avoidance of evil, and they all think that Confucius regards kissing and avoiding evil as a "straight" virtue. " Excerpted from Huang Qixiang's On "Father as Son, Son as Father's Hidden, Straight in it"

Ye Gong Yu said to Confucius: "Our party is straight, its father is busy with sheep, and his son proves it." Confucius said, "The straightness of our Party is different. The father is the son, and the son is the father, straight in it. " The Analects of Lutz.

For a long time, people have different interpretations of this passage, and it has also become the critical material of Confucius' ignorance and filial piety because of various understandings.