Let's say that someone got their green card in 2015. However, since receiving it, they've moved to a different country and haven't lived in the US in 9 years. Now, they want to move back to the US but don't want to give up their permanent residence status. Can they hypothetically go into the US from Canada as a visitor using their Canadian passport, live in the US for a couple of years, and then when they renew their green card in 1-2 years, it'll show that they have a SSN, address, work/school, etc. Is this feasible? would like to know.