If H1b, no much risk (either in China or Mexico), but background check is possible.
If you are on F, B,... then don't leave US before you file I-485.
It depends on what status are you on.
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• 回复:It depends on what status are you on. -jiaxiang2005- ♀ (7 bytes) () 02/27/2007 postreply 17:47:41