Little Sparrow, Winter Chimney, Old Pine Tree, Evening Letter Box is a classic fairy tale. In a faraway country lived a little sparrow. The little sparrow was very smart and liked to fly around in the sky to explore the world. One day, the little sparrow saw a tall chimney in the sky. It was curious to know how the chimney was built. So it decided to go to the city where the chimney was located to see how the people there lived. The little sparrow flew to the city and saw many tall trees. One of the old pine trees was particularly eye-catching. The old pine tree was very old. Its branches were covered with frost and looked very beautiful. The little sparrow saw the old pine tree and thought it was very magical, so he decided to live under the old pine tree and observe its daily activities. In the next few days, the little sparrow observed the daily life of the old pine tree. Old Pine would stuff letters into the mailbox every evening. These letters were all from his friends and family. The little sparrow was very touched. It found that the old pine tree was very kind and always cared about itself and the people around him.