"If you don't study hard, my today is your tomorrow." As long as my brother doesn't study hard, I will take this sentence to educate him.

Yesterday, I came home from work at the construction site. My brother happened to be at home, and I didn't wash my hands. I went to my brother and showed him my calloused hands. I am only 28 years old, but I have the hands of people in their fifties.

At that moment, my brother was lost in thought. He didn't play games all night and has been studying hard.