No. There isn’t any benefit for non-APEC economies

Quick note to Executive Traveller.APEC members are referred to as Member Economies, never as countries. It may seem like semantics but it is an important distinction that anyone working with APEC will understand and relates to the international status of some members The article says you can...

China has been accepting virtual cards since May 1, 2023https://immi.homeaffairs.gov.au/entering-and-leaving-australia/business-travel-card/australian-citizensYou can check your status on your virtual card, if you see CHN, then you have been pre-cleared for China and can use your virtual card

https://immi.homeaffairs.gov.au/entering-and-leaving-australia/business-travel-card/australian-citizens

I am not sure about the need to dressed professionally? Do you mean a suit? I travel in casual clothes because it is more comfortable, jeans, t-shirt, sneakers. I have never been challenged about it. As long as the passport and card are valid I see no reason for being refused entry