Getting a marriage certificate in Australia and getting a marriage certificate in China

First of all, China must take it.

Because China does not recognize foreign marriage certificates. In other words, marriage certificates obtained from foreign countries are not protected by law in China. For example, if someone gets married abroad and gets married again in China, legally speaking, they have no control over you. Of course it's not morally acceptable.

Because you all have Chinese passports, and you will more or less have to return to China in the future. So China must take it.

As for Australia. I also recommend you get it. Australia recognizes foreign marriage certificates. It’s up to you. Like what was said above, haha, it’s also good to have one in English, but I’ll keep it in mind for the future. And it’s very convenient. Just make an appointment and find a friend to be a witness. (The time of both parties is not restricted, which means you can receive it at the same time or one after another. It doesn’t matter.

If you want to immigrate to Australia, it will depend on your relationship, such as cohabitation, etc. instead of the certificate)

Haha, I almost forgot to congratulate you!