It's a fine day.Sunshine told him early in the morning.The feeling that had been lost in his body was awakening little by little, and the sunlight soaked through his skin, moisturizing his dry limbs.He felt the warmth, and there was a desire to move his arms and legs.Xu Shi had accumulated energy for a long time, and Xu Shi just happened to have good weather, so he really wanted to go for a walk.When he thought of the word "outdoors", there was a vivid image in his mind. "Outdoor...outdoor..." He chewed vaguely.Such foreign-flavored words have not flashed through his mind for a long time.What he reads now are thread-bound books, and they are piled up beside his bed, blending in with the dark interior background, not only in line with his state of mind, but also like a portrayal of his life.However, there is no strong word like "outdoor" on it.He wanted to get out of this kind of life and see the long-lost sun outdoors.

It took a lot of trouble to change clothes.You know, he doesn't take off his clothes to sleep every day because he can't take them off.His leg was swollen like a loaf of hard, chunky Russian bread, and had the dark red sheen of old-fashioned furniture.The hint conveyed by this luster is clear to him, but he doesn't care.He thought, he should go to meet the sun.He asked his worker Lao Zhou to help him onto the bed.His bed has long lost its original meaning: since he sleeps on the wicker chair all day long, this bed has become a place for him to put books and change clothes.Under normal circumstances, he would never bother his workers. Even if his legs hurt like arrows, and even if it took an hour to go to the toilet, he would not ask his workers to help.But today, he called a worker.Because his legs can no longer bend, since it has the luster of old-fashioned furniture, it must have the characteristics of wooden materials.He half-lyed on the bed and asked his worker Lao Zhou to change him into a pair of half-new blue material pants. It was true that his legs were so swollen that he couldn't fit the seemingly fat pants. Seeing that the worker Lao Zhou was so tired Panting, he had to give up.So he wore underpants.It is said that wearing underpants is absolutely forbidden to go out, but today is an exception.In order to realize his desire to go out for a walk, and for his own sake, he asked his workers to find a blue cloth robe and wear it on his body. His feet were so swollen that he couldn't wear single shoes, so he wore a pair of cotton shoes with bare feet.

Here is a scene of an old man walking in the sun. It is said to be walking, but it is actually rubbing and moving.What he pursues is the meaning of walking upright, and what he pursues is meeting the sunshine.His waist is stooped, and he seems to be always looking down at something. It is theoretically difficult to pursue upright walking in such a posture.But he wants to pursue, at least that's what he ordered himself in his heart.He moved his steps with a very resolute expression, walked out of Peking University, and came to Zhongguancun Street. This is the goal he set for himself.He must come here, a T-junction in the north of Zhongguancun, to complete his appointment with the sun.

The sun is fine.Because of the late autumn, the surrounding scenery looks crystal clear and clear.Sunlight is like full and clear water, wherever it flows, the scenery will be rich and bright.Now, the sunlight is piled up in front of him, and a rich and clear picture appears in front of his eyes. This is Shuimu Tsinghua——the eternal Tsinghua Garden in his life. I don't know who said that time is eternal, and only we change.Human life is but one long physical process against an immutable background.Now, this experimental class should be over. He wanted to wave to Tsinghua University and say to those students: Goodbye!

He just stood silently in the sunshine, letting the past run wild in front of him.A gust of wind blew over, and he staggered, but finally held on.No one noticed the old man dating the sun, let alone the old man wrestling with the wind.Although Zhongguancun was not as prosperous as it is now, it was never lonely.Vehicles are coming and going on the street, and pedestrians are hurrying on the sidewalk. No one knows who he is. Just like we can't see the stars moving in the sky under the sun. We are doomed to miss this old man. One day in the summer of 1998, when the author was invited by Mr. Qian Weichang, then vice chairman of the CPPCC National Committee, to his residence near Xiaoxitian, Mr. Qian talked about this old man—his teacher—in an excited tone. , a master who trains masters.For a moment, everyone present was deeply shocked.In the limited knowledge of the author, this person has been largely ignored in the list of scientists and educators provided by our mainstream media.

This is a regrettable oversight.We only know that there are "three coins" (Qian Xuesen, Qian Sanqiang, and Qian Weichang) in China's scientific and technological circles, Wang Ganchang, the "father of the atomic bomb", Zhao Jiuzhang, the "father of aerospace", and Wang Daheng, the "father of optics". The scientific and technological heroes of "two bombs and one satellite" know the Chinese Nobel Prize winners Yang Zhenning and Li Zhengdao, and the famous mathematician Hua Luogeng, etc., but they don't know that these Chinese loud noises and Chinese highlights are actually closely related to him!

This person is Ye Qisun, the master of contemporary Chinese physical science, former dean of the School of Science and head of the Department of Physics at Tsinghua University. On January 13, 1977, Ye Qisun, who had never been married and had no children, passed away peacefully on this day after refusing treatment for several days. No one asked to visit him during his lifetime, and no news appeared in the newspaper after his death. Only the young man selling sugar-fried chestnuts on the streets of Zhongguancun and the aunt who set up a fruit stand were surprised: I haven’t seen that old man with a straw rope around his waist coming out to bask in the sun for a long time. Is something wrong?

No one knows him, and no one knows his value. He passed by our era - a great figure whom we know the latest and least, but who has made great contributions to the Chinese scientific community. His life taught us that no matter the day or night, the stars always shine, but sometimes, we cannot see it with our naked eyes.