863211 and Pjiang , how can I try difference source, the PW is f

I am waiting already 6 years, now the I140 approval, and PW gives me trouble, I can not go back china because my can not find job in china due to my major(Libiary science), and I am engaged and plan to have wedding in March,my parents just got B1 visa to attend my wedding, now everything has gone, I will lost my job and my girlfriend,crying................help