Reply

其實是收到4 個Approved Notice，

主申請人（EB2）有2個 Approved Notice，COA:H1B 和 E26

次申請人有2個 Approved Notice，COA:H4 和 E27

這些有什麽區別？

-E26 and E27 are the green card categories, respectively, for professional holding an advance degreen or of exceptional ability (i.e., EB2), and spouse or kid  of an alien classfied as E26 (i.e., EB2 spouse or kid), etc.. 

去申請新的SSN時需要用哪個COA?

-Have you received the physical green card yet? If no, just wait for the green card. After you receive the green card, bring it to the lcoal SSA Office to update your SSN card.