回复：我举手，Pjiang 老师，小白兔老师，我有个问题。

(1)If you are in NIW catetory,your PD is the date USCIS receive you I-140
(2)If you are in EB3 or EB2 category,your PD is the date USCIS receive you PERM
(3)If you are dependent,your LD PD is your PD