Sunday Stamps 028: Historial sites in the Three Gorges Reservoir Area

The China National Philatelic Corporation issued the following special stamps in 2007:

Out of the four issued in the "Historical Sites in the Three Gorges Reservoir Area" series, three were used on the cover that was sent to me. Each of the four stamps have a value of 1.20yuan. The historical sites on the above stamps are, from left: Qu Yuan's tomb, Shibao village, Dachang old town. Not included is Zhang Fei's temple.