New Canada landing question

The Canadian immigration policy requires that
either the entire family land at the same time or
the principle applicant lands before his dependents.

My dependents plan to land from China and I plan to
land from U.S.. So I should land first. The
question is: can my family land right after my landing? That is, is it the case
that right after my landing, there will be a record
at any ports of entry so that my family can land
anytime afterwards?

I appreciate your information or comments.