People who don't go out are not expensive, that is to say, if they just walk around at home and don't travel far, they won't be rich. The value of going out in this proverb is to go out for a walk, but? Is it expensive? It means that a person has to go through many things to mature. The maturity here refers to the maturity of experience. In ancient times, ordinary people were like frogs at the bottom of a well. They relied on the harvest of fields to solve the problem of food and clothing at home every day. Therefore, if they want to live a rich life, they need to travel to the outside world. Just like Hu Xueyan in the late Qing Dynasty and Shen Wansan in the early Ming Dynasty, they all crisscrossed the north and made great achievements, and finally got rich and even got official positions. It can be seen that this proverb is telling us that no matter what the current situation is, only by working hard and going out more can we reach the peak of our career.