People visit during the media preview of "China's Terracotta Warriors: The First Emperor's Legacy", at the Asian Art Museum in San Francisco, the United States, Feb. 21, 2013. The exhibition featuring more than 120 artifacts including ten life-size terracotta warriors and horses from China's Qin Dynasty (221-206 B.C.), will open to the public here from Feb. 22 to May 27. [Xinhua]