Thanks, Leon!
I am filling the application form for PR card. For question 21:
21. Have you travelled or lived outside of Canada in the last five years (or if you became a permament resident less than five years ago, since become a permenent resident)?
which let me fill out the month-year, the location (city, country), reason for absence and number of days for the absence.
Since I am working in the US and ocassionally go back to Canada to see my wife, I will use my wife (i.e., my home) address in Canada to renew my PR card, if I fill out the fields with US city, the reason (working) and the totally days absence (206 days now), I guess I will be rejected for the PR card renew.
Any suggestion is appreciated!