Dear pjiang:
thanks for your answer.
i read the 可怜天下父母心, and use the link there
http://www.immihelp.com/immigrant-visa/cspa-calculator/
* 答案的准确性不再老师的掌控之下
my question is which values are input into the above table for calculation or how to caluclate the extended days? do we need to use priorid date, how about the 准确性 in above calculation.
by the way , in 可怜天下父母心: 比如说,王五同学的 EB-2 PERM 申请于 1/2005,并于 9/2007 获批。随即交了 I-140, ND 为 10/15/2007, AD 为 12/18/2007.
what are the ND and AD? is seems in my I140 aproval form, there are only, PD, receipt day and notice date. so something must be different.
thanks for your help. please solve my confusion. many thanks!