Dear Mike,
I am your friend,Li Hua. Recently,I am about to write a passage about the culture of the native Americans. But there are a few books about it. So I want you to help me to buy some books about the culture.
You can buy as many books as you want. But I need a accurate time that you will send them to me. Please write the time in your letter cautiously.
And what' s more, I will send the money to you after I get the books. If you are willing to help me, I will be happy.
I am looking forward to hearing from you.
Yours,
Li Hua