Should we emigrate in this situation?

I have read what you said carefully. It should be better to immigrate to Canada, but you can't immigrate with your parents because of your age. Besides, you mentioned that "I hope to take advantage of some advantages of Australian immigrants and start a business in China after obtaining permanent residence status" because I want to come back. Why waste time and money going outside? Foreign welfare is good, and so on, for people who have no money. People with money like you-will you pull your face down and ask for welfare? The same is true of medical insurance. Don't be fooled by those immigrants. Besides, they haven't lived there, and they don't know! Ask the wise man!

Conclusion: If I were you, I'd better go home and be a local rich man.