The Terra-cotta Warriors and Horses, a part of Qin Shi Huang's mausoleum, is one of the significant findings in the world archaeological history of the twentieth century. It was constructed for Qin Shi Huang to rule the empire in his afterlife and discovered in 1974 by local farmers in Xi'an. Varying in height, uniform and hairstyle in accordance with rank, the life-sized terra-cotta warriors are arranged in battle formation. The vivid and life-like images reflect the high engraving level of craftsmen. The Terra-cotta Warriors and Horses, the largest underground military museum, was listed as the World Cultural Heritages and honored as "The Eighth Wonder of the World" in 1987.