There is a character called Wang Yangming in The Ming Dynasty. When he was away from the temple, he founded the school of the mind; when he was a parental official, he benefited the community; when the country was in crisis, he used his wisdom and courage to almost single-handedly quell the rebellion and prevent the country from being ruined by civil war. "To establish merit and virtue and speech is hardly a second choice in the last five thousand years." Wang Yangming's great wisdom lies in the fact that he was kinder in the face of the good people and more cunning in the face of the cunning rebels. The world is not one-sided, it is often hermaphroditic. Just like amphoteric tanning agents among leather chemical. Amphoteric tanning agents are tanning agents that have a cationic group and an anionic group in same chemical structure - when the pH of the system is exactly the isoelectric point of the tanning agent. the tanning agent exhibits neither cationic nor anionic properties; When the pH of the system is below the isoelectric point, the anionic group of the tanning agent is shielded and assumes a cationic character, and vice versa.