package for sale. including NIW and Eb1a document lists, 4 cover letters, more than 20 sample letters (physics, chemistry, chemical engineering, environmental protection, EE, energy, nano), petition tricks (getting recommendation letters, exploring your background, etc). Three petitioners got their NIW and Eb1a approved by this package in NSC, TSC and CSC. Ask for $150. If you are interested, please email me at immidiy@hotmail.com