回複：EB-1B and EB2 NIW 推薦信一問？

your NIW recomm letters can be used for your EB1-b application. It is no problem at all. But you need to prepare your NIW letter carefuuly and stress on the influence of your work.

Just for reference!!!

P.S
A COMMERCIAL NIW/EB1 dual pakg is availabe, which is specially designed for such purpose, by using same set of supporting materilas and letters. If interested, drop me a line [e-mail].