我問過律師, 延期是肯定的

"The American Competitiveness in the Twenty First Century Act (AC21),in certain circumstances, allows persons in H1B status to obtain extensions of that status beyond the six-year period (usually referred to as "seventh-year extensions"). Sections 106(a) and (b) of AC21 set forth the following two requirements for such extensions: first, a labor certification application must have been filed for the person at least one year prior; and, second, either the I-140 (Immigrant Petition for Alien Worker) must also have been filed and be pending or approved, or else the I-485 must be pending. In those cases that do not require the filing of a labor certification, like the national interest waiver cases, the I-140 must have been filed a year prior and the I-140 or the I-485 must be pending.