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

来源: 于 2008-07-16 10:14:49 [旧帖] [给我悄悄话] 本文已被阅读：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.