大家好！我叫李明，今年10岁了。我是北京市第一小学五年级的学生。我的爱好是画画和听音乐。我最喜欢的颜色是蓝色，因为它让我感觉很安静。

在学校里，我最喜欢的科目是数学。我觉得数学很有趣，特别是做题的时候，能让我动脑筋。我还有一个弟弟，他今年6岁，正在上一年级。我们经常一起玩游戏，我很喜欢和他在一起。

我梦想将来成为一名科学家，因为我想发明一些有用的东西，帮助人们解决问题。为了实现这个梦想，我现在要努力学习，每天认真完成作业，还经常阅读科普书籍。

放学后，我喜欢去公园散步，呼吸新鲜空气。有时候我会和朋友们一起去打篮球，这让我感到很开心。我也很喜欢帮助别人，比如在课堂上帮同学解答问题，或者在公交车上给老人让座。

总之，我是一个活泼开朗、热爱学习的小学生。我希望以后能学到更多知识，成为一个对社会有贡献的人。

英文原文：

Hello everyone! My name is Li Ming, and I am 10 years old. I am a student in the fifth grade at Beijing No. 1 Primary School. My hobby is drawing and listening to music. My favorite color is blue because it makes me feel very calm.

At school, my favorite subject is math. I think math is very interesting, especially when solving problems. I have a younger brother who is 6 years old and in the first grade. We often play games together, and I really enjoy being with him.

I dream of becoming a scientist in the future because I want to invent something useful to help people solve problems. To achieve this dream, I study hard every day, finish my homework carefully, and often read science books.

After school, I like to take walks in the park and breathe fresh air. Sometimes I go to play basketball with my friends, which makes me very happy. I also like to help others, such as helping classmates with their questions in class or giving up my seat to an elderly person on the bus.

In short, I am a lively and cheerful primary school student. I hope to learn more knowledge in the future and become a person who can contribute to society.