China: Great Wall at Jinshanling

On Monday I got four postcards: two from China, one from Taiwan and one from Hong Kong.

One postcard from China shows the Great Wall. The construction of the Great Wall started circa 220 B.C. when earlier fortifications were connected to a united defence system against invasions from the North. The Great Wall became the largest military structure of the world during the Ming dynasty (1368-1644). It has a historic and strategic importance and a architectural significance. Since 1987 it is a UNESCO World Heritage Site.

Stamps:
Camels (from set of two) (issued 20-02-1993)
Hong Kong (from set of four) (issued 28-11-1995)

Thank You very much Lily!