今天收到CBP的回复,大意是去加拿大30天之内回来不需要新的I-94。这篇email存档, 有它我就放心了。 I94.Correction.Seattle 7:32 AM (2 hours ago) to me It appears your advance parole was revalidated from the prior entry and a new I-94 not generated. Travel to Canada for less than 30 days is not considered a meaningful departure from the US.