My best friend-edited

I have a best friend in China.Her name is xu.We had know each other since we were in grade seven.The first time I met her,I didn't know about her.But after the school military training,we became good friends.We did many things together.Many people said that we look like sisters.She's very smart.She isn't very tall,but she runs very fast,and she won a prize.She's good at math too,she always helps me with my math problem.We went outside every weekend.Sometimes we went shopping and sometimes we went to the sea.We have many topic.She is very fun.She always makes people laugh.When she knew that I had to came to Thailand for studyng. She was very sad,because we can't see each other for a long time.But we can write to each other. Before I came to Thailand she wrote some letters to me. She asked me to bring the letters to Bangkok,and said that if I miss her.I can read the letters.I hope I can finish my language learning quickly.