What does "Use EAD" mean?

I searched this forum about EAD and AP, and now I have a question about "Use EAD". Suppose I had H1B, and I applied for EAD and AP. I went back to China and used AP to come back to the U.S. Is my H1B still valid? I applied EAD, but never used it. What is the difference between "apply for an EAD" and "use an EAD". Thanks.

所有跟帖： 

• 回複：What does "Use EAD" mean? -immigrate- ♂ (777 bytes) () 11/09/2005 postreply 21:03:19

• 回複：回複：What does "Use EAD" mean -YTHT1986- ♂ (1577 bytes) () 11/09/2005 postreply 21:25:02

• Your HR is wrong! Search this -Immi_US- ♂ (106 bytes) () 11/10/2005 postreply 05:22:04

• I think that his current -128233- ♀ (158 bytes) () 11/10/2005 postreply 07:53:17

• If he has been using EAD, his (圖) -Immi_US- ♂ (94 bytes) () 11/10/2005 postreply 08:12:03

• Read this -immigrate- ♂ (68 bytes) () 11/10/2005 postreply 07:28:39

• 回複：回複：What does "Use EAD" mean? -160152- ♀ (28 bytes) () 11/10/2005 postreply 07:39:26

• 回複：What does "Use EAD" mean? -YTHT1986- ♂ (1580 bytes) () 11/10/2005 postreply 20:54:17