This material reminds me of another story about a fisherman and a rich man. The rich man said, "Being rich can lie on the beach and bask in the sun like me." The fisherman asked the rich man, "What do you think I am doing now?" Reflection is "What are you doing here?" Climb up and climb up can mean development, progress, struggle, success and so on. Since "beauty" (which can mean "happiness") is at the foot of the mountain, why bother to climb it? This involves thinking about the meanings of development, progress, struggle and success. Of course, as a father, you can completely answer your son: First, if you don't climb the mountain, you won't find the beauty at the foot of the mountain. Mountain climbing can help us understand more about the meaning of life; Second, in addition to the beauty at the foot of the mountain, we can see more beauty, so-called climbing high and looking far; Third, upward is an end in itself, enjoying the process. The appearance of this material has a realistic background: why is nostalgia so popular? At the foot of the mountain, what is the beauty of the starting point? "I remember many years ago in the spring, when I didn't cut my long hair, when I didn't have a credit card, when I didn't have her, when I didn't have 24-hour hot water, I was so happy ..."