How long can parents apply for a Canadian green card for their children?

If parents have obtained a Canadian green card and want to apply for a green card for their children, they need to meet the following conditions:

1. The child works in the local area for one year.

2. For applicants born in Chinese mainland, it takes 5-6 years to get an immigrant visa.

Therefore, if parents have obtained a Canadian green card and their children have worked in the local area for one year, they can apply for a green card for their children. The specific application process and required materials can be consulted with the local immigration bureau or relevant departments.