Shaanxi Province, the hometown of Terra-cotta Warriors and Horses, was called Qin in ancient time. It is located in the middle reaches of the Yellow River, and known as the natural history museum of China and the cradle of Chinese civilization. In history, there are 14 dynasties setting up their capitals here, including Zhou Dynasty, during which China set up its standard of civilized ruling; Han Dynasty, during which China opened the gate of friendship to the world through the famous Silk Road; and the Tang Dynasty, when feudalism and international exchange reached its peak.