Tell me about the bottle picker.

On Sunday, I saw two children picking up rubbish. The older one looks six or seven years old, and the younger one is only four or five years old. When winter comes, it becomes very cold. My mother and I both put on thick clothes. The two children were only dressed in rags and thin clothes. They are also very thin, and they can tell at a glance that they are children of poor families.

They carry garbage bags to pick up bottles discarded by others on the road and go to the garbage bins on the street to find food. The little one tripped over something, and the garbage bag flew into the grass, spilling bottles and cans all over the floor. "Wow!" With a cry, the older one quickly put down his garbage bag, comforted the younger one, patted off the dust on his body, let him sit next to him and rest, and helped the younger one pick up the bottle himself. He bent down to pick up a pile of bottles and put them in the bag one by one. His head bit by bit, like a duckling foraging for food. He was busy for a long time, finally packed up, and the two men continued on their way with their bags.