Thank all people who gave very usefull information here.
Here is my 140 files:
RD 06/07/05, both 140 and 485, AD 11/22/05, without REF.
university research faculty, PhD from china,cell biology
14 papers, 9 first author, 5 from USA, more than 20 citations
7 recomandation letters, 1 from china, 1 from France, 1 from Greece and the rest from USA
3 meeting abstracts (all international), 1 oral present
1 membership in the academic field
teaching experience
I am not a lucky one, just follow the VSC I-140 schedule.
But still long way to go, this is just the first step!
Hope this will be helpful.