1. knowing how to advance and retreat means knowing when to move forward and when to retreat, and being able to understand the relationship between gains and losses. Metaphorically, when doing things, a person can see clearly his own environment and situation, judge the situation, and be good at observing and choosing.

2. "Knowing the gains and losses, knowing 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 accommodate everything. Being a man is like water, you can advance and retreat, but you know how to advance and retreat. Those who are willing to suffer losses will eventually not be able to suffer losses and will return sooner or later; Those who are willing to admit defeat will eventually lose their self-esteem and win the hearts of the people.