The hedgehog theory tells a story: two sleepy hedgehogs huddled together because of the cold. But because everyone has thorns, the other person can't sleep well. So they left a distance, but they were too cold to stand up. So they are together again. After many twists and turns, the two hedgehogs finally found a suitable distance: they can get each other's body temperature without being pricked.
Emphasis is placed on the "psychological distance effect" in interpersonal relationships.
"Those who are sparse keep secrets, and those who are secret keep secrets" is used in management, that is, leaders must maintain close relations with their subordinates if they want to do a good job, but this is a close relationship and an appropriate cooperative relationship. Keeping a psychological distance from subordinates can avoid their preparedness and nervousness, reduce their compliments and flattery, and prevent subordinates from being intimate and eating and drinking. Doing so can not only gain the respect of subordinates, but also ensure that the principle is not lost in the work.