PJIANG, 各位大師, about A#

Just received 140 approve notice ( PD Nov,2007, NSC) , there is a number: Axxx xxx xxx, same as which showed on my H1 797.
可是當初１４０ 時啥也沒填呀? 各位大師,難道這就是傳說中的 A#!!!!!!!!!!!!!!