Dear Mr. Cheng,
Thank you very much for your warm hospitality during our stay in Beijing. I'd like to express my appreciation to you for making our trip such an enjoyable and successful one.
We sincerely appreciate for your sparing time to show us around your office and factory. Surely I have a happy vacation, which will be remembered for long. I also sincerely invite you to visit us in London in the near future. Thank you again. Let's keep in touch.
I have already received your message. I am honored to accompany you through this time in Beijing, and very glad you have fun here. There are many good memory for me this time. I hope you have a chance to pay a visit to Beijing again. I wish you success in your work. I am looking forward to our next meeting.
I have received your message. I am glad to meet you in Beijing. To be with you is a good memory for me. I am also looking forward to going to London. I hope we can meet again. Wish our friendship last forever, and keep in touch with each other closely. I wish you all good. See you next time.