Dear Mr Zhang and Benson,

I would like to inform you that within a week of submission of RFE letter, my I-140 case was APPROVED this morning!

Now I am waiting for I-485 application to be adjudicated. I knew based on my friend's experience XXXX that I am dealing with a respectful law firm. I am very excited now but have to focus on my studies and will keep celebration for later on. 

Please let me know what is the procedure for the remaining payment that I owe.

Thank you kindly for all your help and guidance!