Several years ago, I spent most of my time at a mental hospital (精神病院) in our town. I found much joy there. At first it was a little scary to be there, but I stayed on, because I had a reason for doing this.
I volunteered in a locked-up (封闭的) environment. To my surprise, I found that a friend of my parents' was a patient in this hospital. I knew, when I was a baby, this woman wanted to keep me because she had no children. I looked after this woman and showed my old photos to her. Finally, she was able to remember some old things, and she said to me one day, "Dear, you should not come here." But I wanted to bring something happy into this woman's life. I learned that because she had no family, she couldn't leave here and go home. So I brought her to my home twice and I still remembered the happy smile on her face.
I have never forgotten this volunteering experience. This woman later passed away. I can't see her anymore, but I'm happy that I have done something to make a difference in another person's life.