How to immigrate to Canada with an American green card?

Are you okay? Why immigrate to Canada when you have an American green card?

All the good things in Canada have gone to the United States, only the bad ones are in Canada.

Wages in Canada are very low.

Which country you go to has nothing to do with which country you have a visa (green card is a permanent residence visa), only your passport. You still have a China passport, so you still need a visa. Get a study visa at school and a work visa at work. The prerequisite for this is that Canada wants you, such as applying for a school or a job. What's left is some financial proof.