阅读理解。

My name is Liu Ming. I'm 12. I'm 159 cm tall. I have a friend. His name is Wang Bing. He is 13 years old. He is 161 cm tall. I'm fatter than him. But he is stronger than me. We help each other. Sometimes, I teach him Chinese. Sometimes, he teaches me English. We are good friends. We often walk to school.

Yesterday was a sunny day, we went to a forest park by bus. There is a big lake and many beautiful flowers in the park. We went camping and took pictures. We rode bikes, too. We ate cakes and lunch together. We had a good time.