Writing prompt: The Trip of the Great Wall

Student essay:
As you know,I was invited to go to China as the messager between Canada and China during the Spring Festival.I lived in my Chinese friend's home and play together.
During these days I studied with my friends that come from China and talked with them and we also did lots of sports.It was happy for me to visit the snece of Beijing and watch Peking Opera.By the way , Chinese food were delicious!I can not forget them , espiecially jiaozi is my favourite food.My friends told me lots of history of the China.
I spend a few wonderful days.I like this life very much

Corrected essay:
As you know, I was invited to go to China as the messenger between Canada and China during the Spring Festival. I lived in my Chinese friend's home and played together.
During these days I studied with my friends who came from China and talked with them and we also did lots of sports. It was happy for me to visit the scenes of Beijing and watch Peking Opera. By the way, Chinese food was delicious! I can not forget them, especially jiaozi, which is my favourite food. My friends told me lots of history of China.
I spent a few wonderful days. I liked this life very much.