Studying in Australia, getting pr after graduation, is it easy to find a lot of jobs?

Yes, many financial jobs, such as banks, generally require candidates to have PR status in recruitment requirements.

Other service industries, if they are companies run by China people, do not need any identity. However, large Australian companies will still have requirements for identity.

If you are an engineering major, be specific. If your major is chemical engineering, I suggest you go to Western Australia. If you can work in a regular company, the salary is very good.