What about Canadian students' tourist visas to Australia?

The visa is only for passports. China students hold China passports, so like other China people, they must obtain an Australian tourist visa first.

You can apply directly to the Australian Embassy in Canada, download the application form from the embassy website, fill it out and submit it together with the round-trip air ticket, accommodation voucher (such as the hotel you booked) and financial guarantee corresponding to the accommodation (such as providing bank deposits and running accounts).

On the application form, there is a column asking if you have a visa from other countries. Because you have obtained a visa from Canada, it is easy to get a tourist visa from Australia. They are all Commonwealth countries.