Writing prompt: My Weekend

Student essay:
Last weekend, I went to the Great Wall with my family.
In front of the city gate, we met a foreign boy,"Excuse me,"he said,"Where can I buy tickets?"
He said he called Mike, he came from the US. I also introduced myself to him.
"Shall we visit the Great Wall together?"I said."I can introduce you to the Great Wall and its history."
"Good!"He said and smiled,"I can't wait to visit the Great Wall!"
On the way, I talked about the history of the Great Wall and his: the Great Wall was built during the Warring States period,which was led by Qin Shihuang to build and defend the enemy's invasion--
We talked a lot, and we were happy.We exchanged the address. We have agreed to contact us by writing letters.
I like this new friend very much, we have a lot of same hobby, I hope we can travel together in the future.

Corrected essay:
Last weekend, I went to the Great Wall with my family.
In front of the city gate, we met a foreign boy. "Excuse me," he said, "Where can I buy tickets?"
He said he was called Mike, and he came from the US. I also introduced myself to him.
"Shall we visit the Great Wall together?" I said. "I can introduce you to the Great Wall and its history."
"Good!" he said and smiled. "I can't wait to visit the Great Wall!"
On the way, I talked about the history of the Great Wall: the Great Wall was built during the Warring States period, which was led by Qin Shihuang to defend against the enemy's invasion.
We talked a lot, and we were happy. We exchanged addresses. We agreed to contact each other by writing letters.
 I like this new friend very much. We have a lot of the same hobbies. I hope we can travel together in the future.