I am writing you this letter to express my gratitude first for you kindness and hospitality towards me. During my visit of sino-American cultural exchange in your country, I've learned a lot about your people's custom and speical culture. Your help and guidance is so important for me.
I'm now quite interested in american culture and hope to further know it in the future. As the world globalization developes, I think this is of great significance for both of us. The other thing is that I'd like to ask you to have a visit in china in due course. Then I can have the opportunity to welcome you back and show you something about our Chinese culture. Hope you can come soon!