What makes life better?

What makes life better? The 200-word composition is as follows:

Smile, make life better.

In spring, ice and snow turn into water, and mud soup and puddles are everywhere in front of the house. Occasionally a bird flies in the sky, chirps and disappears. Hutongs, large and small, cross between roads and railways. In the first alley near the railway, rows of small fruit trees are planted, which have just sprouted.

Every day, when adults go to work and children go to school or play, they will find that those old and melancholy eyes have been following their footsteps. It was dark, people were quiet, the jumping lights of every household gradually went out, and the old man went back.

I don't know when the old man began to smile at people. I don't know when to start accepting his smile. Come back every day, just in time for the sunset, and the small red light reflects the clouds warmly.

After Zheng, my hand involuntarily retracted my sleeve, frowned and laughed happily again, and the wrinkles on my face seemed to disappear. At this time, in my eyes, he became a majestic young man with black hair and neat military uniform. I walked past him in my fantasy, and when I turned around, he was gone, leaving a beam of sunshine on the ancient stone mill.

The next day, I walked through the hutong again and found that the old man looked awkward to me. I shook my fist and got up the courage to go forward and talk to him. His voice became hoarse and paused from time to time, but I understood what he meant. No one has ever smiled at him.

But my smile at him made him really happy. That night, he ate more rice and told jokes to his wife, who had never seen him so happy. Day after day, every day.

Rows of fruit trees are green, birds are twittering, and that knowing smile will always stay in my heart. I know life is better because of it.