Ladies and Gentlemen:
Welcome to the Great Wall. Starting out in the east on the banks of the Yale River in Leaning Province, the Wall stretches westwards for 12,700 kilometers to Jiayuguan in the Gobi desert, thus known as the Ten Thousand Li Wall in China. The Wall climbs up and down, twists and turns along the ridges of the Yanshan and Yinshan Mountain Chains through five provinces——Liaoning, Hebei, Shanxi, Shaanxi, and Gansu and two autonomous regions——Ningxia and Inner Mongolia, binding the northern China together.
Historical records trace the construction of the origin of the Wall to defensive fortification back to the year 656 B.C. during the reign of King Cheng of the States of Chu. Its construction continued throughout the Warring States period in the fifth Century B.C. Walls, then, was built separately by these ducal states to ward off such harassments. Later in 221 B.C. The most extensive reinforcements and renovations were carried out in the Ming Dynasty (1368——1644) when altogether 18 lengthy stretches were reinforced with bricks and rocks. it is mostly the Ming Dynasty Wall that visitors see today.
The Great Wall is divided into two sections, the east and west, with Shanxi Province as the dividing line. The west part is a rammed earth construction, about 5.3 meters high on average. In the eastern part, the core of the Wall is rammed earth as well, but the outer shell is reinforced with bricks and rocks. The most imposing and best preserved sections of the Great Wall are at Badaling and Mutianyu, not far from Beijing and both are open to visitors.