Yes... These 4 B744 where expected to join PR by around 1997 when we had the Asia financial cursis... And also the time when PR was shut for weeks due to financial problem and problem with their work force...
At the end, Boeing have allow PR to postpone the order with no penitly charge... So you can see it as this is only a revise order from the previous remaining 4 B744 to a number of B77W...