When I was eleven, my mother worked all day. As a sister, I had to look after my younger sister. My little sister was about three years old and she missed Mum all the time.
One day, she started crying for Mum after lunch. She was so young and really needed Mum. To make her stop crying, I dressed her up, carried her on my back and walked out to the park.
Before we got to the park, I found one of her shoes lost. I took her off my back and put her down.
I knew we needed to find that shoe, for our mother didn't have enough money to buy her new shoes. I had to go back to find it, so I told my sister to wait right there.
A man happened to hear my words and asked me, "Are you leaving your sister here to find the shoe, what will you do if she's not here when you return?" I didn't know how to answer that question." It's OK if you can't find the shoe, but it is not OK to lose your sister," he added. Then he sent us to Mum's workplace by taxi and left without another word.
People always say, "Do not believe in strangers（陌生人）." But during my whole life, the kindness of the man is always in my mind. I feel regretful that I can't find him and say "Thank you." I do not even remember what he looked like, but he taught me a lesson﹣﹣people are more important than things.
