Datong River Diversion Project

2001-16, Datong River Diversion Project《引大入秦工程》 Stamp Title: Datong River Diversion Project Scott No: 3131， 3132， 3133， 3134 Serial number: 2001-16 Values in set: 4 (4-1), Key Diversion Project at the Head of the Canal, 80 fen, 50*30 mm (4-2), Inverted Siphon on Xianming Gorge, 80 fen, 50*30 mm (4-3), Tunnel of the Canal, [...]