Question on I-140 about "the same or similar field"

來源: 於 2008-07-16 10:14:49 [舊帖] [給我悄悄話] 本文已被閱讀：次

Is there any official definition on the term "the same of similar filed" when someone changes job after 180 days of the I-140 approval? Thanks a lot for the answers in advance.