What is the renewal process of Portuguese immigrant residence visa after its expiration?

Hello, the renewal process of Portuguese immigrant residence visa after expiration is as follows:

1. Make an appointment 2 months before the expiration of the Portuguese immigrant residence visa;

2. Issue a property certificate within the validity period to prove that the property is still in the name of the main applicant;

3. Submit the application materials 1 month before the deadline;

You can get a new residence visa after 4 or 2 months.