This motto is taken from Han Yuefu's ancient poem Long Songs. The original poem reads: "In the garden of youth, sunflowers are basking in the sun. Spring fills the earth with hope, and everything presents a scene of prosperity. I am always afraid that when the cold autumn comes, the trees in Ye Er will turn yellow and the grass will wither. All rivers return to the East China Sea, when will they return to the West? If you don't work hard, the boss will be sad. " It can be seen that the last two sentences are the conclusion of the whole poem and the main theme of the poet's poetry. In the poem, the image of sunflower in the garden with warm spring flowers and withered autumn colors is used to describe the beauty of life in youth and the misery in old age; The metaphor of the passage of time and the eastward flow of the river will not stay for one person, but only for these last two warnings.

We don't know whether this unknown poet more than two thousand years ago is regretting his life. But what is certain is that many people will be deeply shocked by this poem when they reach the age of white hair, so it will be widely read in countless ancient poems and spread to this day. "Young and strong" summarizes the period from adolescence to thirties and forties, or in other words, it is equivalent to less than 30 years from adolescence to adulthood. This is the most precious period in everyone's life. People in this period are active in thinking, enthusiastic, energetic, imaginative, full of courage and enterprising spirit, which can be described as "dare to think, dare to say and dare to do". Throughout the ages, successful people, their pursuit of academic success until their career success, are probably achieved during this period. If a person doesn't make good use of this precious time to realize his "ambition" or lay a solid foundation for realizing his "ambition", he can't make a difference. Imagine, how many twenty or thirty years can there be in life? How many degrees of youth can I have? Therefore, Confucius, a great educator, once pointed out: "Those who are ignorant of four or five hundred are not afraid of themselves." Confucius means that when a person is 40 years old, at most 50 years old, he has not made a difference in society, and this is his life. It is precisely because of this that Yue Fei, a national hero, used this maxim to express his attitude towards life in his masterpiece "The Red River": "Thirty fame is dust, and eight thousand miles is a cloud and moon. Don't wait for leisure, white boy head, empty and sad. " He used his short and brilliant life to give strong encouragement and encouragement to future generations.