Depends on how you define "返美證"
For AP - http://blog.wenxuecity.com/blogview.php?date=200710&postID=20710#AP
For RP - http://blog.wenxuecity.com/blogview.php?date=200804&postID=25254
For AP - http://blog.wenxuecity.com/blogview.php?date=200710&postID=20710#AP
For RP - http://blog.wenxuecity.com/blogview.php?date=200804&postID=25254