谢谢众位坛友的热心帮助，我的EB1A 140终于在RFE后Approve了。以下是基本过程：
E-filed I-140 on 1/24, TSC
LUD 1/25, 1/28, 1/30, 2/1
Upgrade to PP 2/6, received 3 email at 4:46PM confirmed PP
6:13PM received 1 email saying case has been approved.
Inquire USCIS on 2/9,was told that it is an error in their system, the case was not approved yet.
LUD 2/7, 2/8, 2/13, 2/14
2/14, received email and fax for RFE
Respond RFE on 2/22
LUD 2/22,2/24, 2/26, 2/27
2/27, received email saying approval notice sent,USCIS status updated too.
LUD 2/28
3/1, received I-797 notice of action using pre-paid usps express envelope.
Hope the above info is helpful to someone.