PR的永久只是限于你人在新加坡的情况下,一旦你人在外国REP又没renew成功,PR就会立马作废了。Ica的网站写的挺清楚的:
A valid Re-Entry Permit (REP) is necessary whenever a Singapore Permanent Resident (SPR) wishes to travel out of Singapore. It will enable the Permanent Resident to retain his/her SPR status while away from Singapore.
A SPR who remains outside Singapore without a valid REP will lose his/her SPR status.