Advanced Parole for spouse

Both my wife and I are I485 pending status (I140 approved already) and we had gotten our first AP's at the time when our I485 applications were submitted, but they have all expired recently.

My question: My wife needs another AP so that she can visit China later this year. How do we go about the application since she is the derivative beneficiary of our I485 application? BTW, I do not need to renew my AP and she is the sole traveller.

Thanks for sharing your advice.