The first principle of a leader: self-confidence. This is the most important quality of a leader, and of course, we ordinary people should also have this quality. However, if a leader lacks self-confidence, the resulting impact can be devastating. But this self-confidence is not just simple confidence; it's confidence based on an accurate understanding of one's own abilities. Without this premise, it's not confidence—it's arrogance. An arrogant army will be annihilated on the battlefield; nowadays, it's often said that the business world is like a battlefield, and an arrogant team won't survive long in the business world either. But how to understand oneself? This isn't something that can be explained in just a few sentences. This is essentially an issue of a leader's personal cultivation, and it can even rise to the level of discussing personal charisma.