Thanks Kerstin, this is a nice overview. I have just added the aircraft usually operated on the routes and one route to give a complete overview about the flights.

Until March 26th 2005 LH did:
LH 726 & 727 MUC-PVG-CAN-PVG-MUC 346
LH 744 & 745 FRA-BKK-MNL-BKK-FRA 744
LH 778 & 779 FRA-SIN-CGK-SIN-FRA 744

From March 27th 2005 LH offers:
LH 776 & 777 FRA-SIN-FRA 744
LH 778 & 779 FRA-BKK-CGK-BKK-FRA 744
LH 788 & 789 FRA-CAN-MNL-CAN-FRA 346
LH 726 & 727 MUC-PVG-MUC 340

No changes:
LH 772 & 773 MUC-BKK-SGN-BKK-MUC 346
LH 782 & 783 MUC-BKK-KUL-BKK-MUC 346