I am considering applying for an Amex card, please let me know if my plan is sound. I am planning to apply for the Amex Platium in March. Plan is I am the primary cardholder. My niece will be secondary (authorized user) My niece is doing a YEG-YVR-PVG-TAO round trip with my elder mom later in the year. If I add her as my authorized user, will both of them have free access to lounges in YVR and PVG? Or should I add my mom as AU too if priority pass will not allow guest free? It will be $175 for authorized user(s), right? Which lounge will they have access to if any at PVG and YVR? I see that Some lounges has time limit such as 2 hour. Is it the case in either of the airport? I have the good credit in both US and Canada. Which one should I apply? My primary residence is In US. So I prefer to apply for US card, but if Canadian card will give me better access, I can do that as well. Thanks for your help!