How to apply for immigration to Australia at the age of 37?

It's hard. All the occupations you mentioned are VETASSESS, not to mention whether you recognize China's education and work experience. They require you to engage in at least two occupations, but you are a university teacher. University teachers are required to be nominated by employers, so you are hopeless.

At the age of 37, I can't get the highest score, and IELTS counts as four. 7. Only a doctor with a non-Australian degree can get five points. Not enough, you have to invest in immigration.