In 221 B.C. Yin Zheng, the highly-gifted, ambitious king of the Qin Kingdom ended the turmoil and chaos among the dukes and kings in the Warring States period, and established the first united, centralized, multi-national feudal monarchy-the Qin, styling himself the "First Emperor"or the "Shih Huangdi".The "First Emperor"unified the vocabulary, the measurement system and the currency, founded the prefectures and counties system, constructed the famous Great Wall and built extravagant palaces,mausoleums and temporary palaces. 

    Now the architectures above the ground have long been demolished in battles and fires, but the things underground have been preserved. Just take the instance of the discovery of the terra cotta warriors buried in the proximity of the mausoleum of the "First Emperor".These are reputed as the Eighth World Wonder, the grandeur of which attracts numerous admiring tourists from home and abroad.