1, knowing gain and loss, knowing advance and retreat means knowing when to advance and when to retreat, and being able to understand the relationship between gain and loss. For example, when doing things, a person can see clearly his own environment and situation, judge the situation, and be good at observing and choosing.

2. "Know the gains and losses, know the advance and retreat." It's a famous saying of Liu Bang. When he realized life, he mentioned that life is not how many things you see clearly, but how many things you underestimate. The width of the soul is not how many people you know, but how many people you tolerate. Be a mountain, look at everything and be inclusive. Being a man is like water, you can advance and retreat, but you must know how to advance and retreat. Those who are willing to suffer losses will eventually be unable to suffer losses and will have to pay them back sooner or later; Those who are willing to admit defeat will eventually lose their self-esteem and win the hearts of the people.