Dear Mr. Zhang,

We would like to express our immeasurable gratitude for your assistance and the excellent services we have received for our EB2 Green Card application process since last year.

Under a lot of challenges we could have worked together with you and Mr. Mai to resolve those to successfully accomplish our goal this week.

Again, we want to extend our heartfelt thanks to you and Mr. Mai for this success of our EB2 Green Card in four months.

We will keep in touch.