For my case, both APs were stamped at the first time and returned on original copy back to me. When I used my AP the second/third time, the officer stamped on the original copy. So you may have more than one stamps on your original copy if you use AP more than one time. somebody suggested to make a copy and bring both original and copy versions. The office may want to collect one copy as his/her record.
【在 A*****n 的大作中提到】 : For my case, both APs were stamped at the first time and returned on : original copy back to me. : When I used my AP the second/third time, the officer stamped on the original : copy. So you may have more : than one stamps on your original copy if you use AP more than one time. : somebody suggested to make a copy and bring both original and copy versions. : The office may want to collect : one copy as his/her record.