Immigration to Canada delays the other half's stay.

1, if she is the main applicant, she must declare landing before or at the same time as you and your child. If you are the main applicant, she can log in later, but usually she will log in within one year after the medical examination results come out.

It is no problem to go back to China within two weeks. If you want to keep your permanent residence, you only need to make up for two years in five years. According to your description, it should be possible.

3, you can collect it on your behalf, and all your maple leaf cards can be mailed to the address specified when you log in.