Dear John,
Long time no see,how are you recently?I am really thankful to you for your enthusiastic hospitality when I was on business in Germany last month.During the period of my business trip in Germany,I paid a visit to your company and the advanced technology and management made a deep impression on me.Besides,we have discussed some issues which are interesting to both of us and we felt very content.In the end,you will be welcome if you pay a visit to Shanghai.
I am looking forward to hearing from you.
Yours sincerely
Mark
January 12th,2010
希望能帮上你!