And Canadians, how long can they get divorced?

It doesn't matter to get married in China. You should have submitted something when you immigrated, saying that you were husband and wife. If you are not sure, you can also check it. Because there are a lot of fake marriages now, you can only divorce if you get married 1 year. You must live together during this time, which means that all the addresses you provide to the government are your two homes. These addresses can prove that you two live together. If you go out to rent a house, just keep that address. If the address shows that you have been separated for more than 1 year, the government will help you even if you don't divorce.

/kloc-divorced 0/year ago, should be repatriated. (I don't know what I heard)

It depends on your immigration application. Normally, your husband will help you get married. That kind is easier to handle. It is troublesome to apply for skilled migration, but you can stay in Canada even if you divorce. Stay for three years within five years without any bad records. Then go to the exam (singing the national anthem, Canadian national customs and a bunch of festivals) and attend the naturalization ceremony after passing.